61532508837 has 4 divisors (see below), whose sum is σ = 82043345120. Its totient is φ = 41021672556.

The previous prime is 61532508827. The next prime is 61532508841. The reversal of 61532508837 is 73880523516.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61532508837 - 2⁶ = 61532508773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61532508827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10255418137 + ... + 10255418142.

It is an arithmetic number, because the mean of its divisors is an integer number (20510836280).

Almost surely, 2^61532508837 is an apocalyptic number.

It is an amenable number.

61532508837 is a deficient number, since it is larger than the sum of its proper divisors (20510836283).

61532508837 is a wasteful number, since it uses less digits than its factorization.

61532508837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20510836282.

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 61532508837 in words is "sixty-one billion, five hundred thirty-two million, five hundred eight thousand, eight hundred thirty-seven".