61031249457 has 8 divisors (see below), whose sum is σ = 82589551776. Its totient is φ = 40080223392.

The previous prime is 61031249441. The next prime is 61031249533. The reversal of 61031249457 is 75494213016.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61031249457 - 2⁴ = 61031249441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61031249407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151818828 + ... + 151819229.

It is an arithmetic number, because the mean of its divisors is an integer number (10323693972).

Almost surely, 2^61031249457 is an apocalyptic number.

61031249457 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

61031249457 is a deficient number, since it is larger than the sum of its proper divisors (21558302319).

61031249457 is a wasteful number, since it uses less digits than its factorization.

61031249457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303638127.

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 61031249457 in words is "sixty-one billion, thirty-one million, two hundred forty-nine thousand, four hundred fifty-seven".