61280451937 has 16 divisors (see below), whose sum is σ = 62457216640. Its totient is φ = 60111963648.

The previous prime is 61280451931. The next prime is 61280451943. The reversal of 61280451937 is 73915408216.

61280451937 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61280451931) and next prime (61280451943).

It is a 3-Lehmer number, since φ(61280451937) divides (61280451937-1)³.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 61280451937 - 2⁷ = 61280451809 is a prime.

It is a deceptive number, since it divides R_61280451936.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61280451931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19335889 + ... + 19339057.

It is an arithmetic number, because the mean of its divisors is an integer number (3903576040).

It is a 2-persistent number, because it is pandigital, and so is 2⋅61280451937 = 122560903874, but 3⋅61280451937 = 183841355811 is not.

It is a Poulet number, since it divides 2^61280451936-1.

Almost surely, 2^61280451937 is an apocalyptic number.

61280451937 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

61280451937 is a deficient number, since it is larger than the sum of its proper divisors (1176764703).

61280451937 is a wasteful number, since it uses less digits than its factorization.

61280451937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4360.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 61280451937 in words is "sixty-one billion, two hundred eighty million, four hundred fifty-one thousand, nine hundred thirty-seven".