61899574488 has 32 divisors (see below), whose sum is σ = 154755794160. Its totient is φ = 20632277120.

The previous prime is 61899574487. The next prime is 61899574489. The reversal of 61899574488 is 88447599816.

It is an interprime number because it is at equal distance from previous prime (61899574487) and next prime (61899574489).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61899574483) 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, 700906 + ... + 784262.

Almost surely, 2^61899574488 is an apocalyptic number.

It is an amenable number.

61899574488 is an abundant number, since it is smaller than the sum of its proper divisors (92856219672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61899574488 is a wasteful number, since it uses less digits than its factorization.

61899574488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114307 (or 114303 counting only the distinct ones).

The product of its digits is 139345920, while the sum is 69.

The spelling of 61899574488 in words is "sixty-one billion, eight hundred ninety-nine million, five hundred seventy-four thousand, four hundred eighty-eight".