61623057988 has 12 divisors (see below), whose sum is σ = 114183901692. Its totient is φ = 28999086080.

The previous prime is 61623057919. The next prime is 61623058001. The reversal of 61623057988 is 88975032616.

It can be written as a sum of positive squares in 2 ways, for example, as 50011271424 + 11611786564 = 223632^2 + 107758^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453110653 + ... + 453110788.

It is an arithmetic number, because the mean of its divisors is an integer number (9515325141).

Almost surely, 2^61623057988 is an apocalyptic number.

61623057988 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

61623057988 is a deficient number, since it is larger than the sum of its proper divisors (52560843704).

61623057988 is a wasteful number, since it uses less digits than its factorization.

61623057988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906221462 (or 906221460 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 61623057988 in words is "sixty-one billion, six hundred twenty-three million, fifty-seven thousand, nine hundred eighty-eight".