21554610630696 has 256 divisors, whose sum is σ = 70353998668800. Its totient is φ = 6028180704000.

The previous prime is 21554610630617. The next prime is 21554610630697. The reversal of 21554610630696 is 69603601645512.

21554610630696 is a `hidden beast` number, since 2 + 1 + 5 + 546 + 1 + 0 + 6 + 3 + 0 + 6 + 96 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (21554610630697) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 180666055 + ... + 180785321.

It is an arithmetic number, because the mean of its divisors is an integer number (274820307300).

Almost surely, 2^{21554610630696} is an apocalyptic number.

21554610630696 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21554610630696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35176999334400).

21554610630696 is an abundant number, since it is smaller than the sum of its proper divisors (48799388038104).

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

21554610630696 is a wasteful number, since it uses less digits than its factorization.

21554610630696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125157 (or 125147 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 21554610630696 in words is "twenty-one trillion, five hundred fifty-four billion, six hundred ten million, six hundred thirty thousand, six hundred ninety-six".