61898654963904 has 112 divisors (see below), whose sum is σ = 178672144169856. Its totient is φ = 18756105984000.

The previous prime is 61898654963903. The next prime is 61898654963983. The reversal of 61898654963904 is 40936945689816.

61898654963904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 61898654963904.

It is not an unprimeable number, because it can be changed into a prime (61898654963903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36880404 + ... + 38522220.

Almost surely, 2^{61898654963904} is an apocalyptic number.

61898654963904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

61898654963904 is an abundant number, since it is smaller than the sum of its proper divisors (116773489205952).

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

61898654963904 is a wasteful number, since it uses less digits than its factorization.

61898654963904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1659694 (or 1659684 counting only the distinct ones).

The product of its (nonzero) digits is 2418647040, while the sum is 78.

The spelling of 61898654963904 in words is "sixty-one trillion, eight hundred ninety-eight billion, six hundred fifty-four million, nine hundred sixty-three thousand, nine hundred four".