21554610630602 has 128 divisors (see below), whose sum is σ = 39663546531840. Its totient is φ = 8586526798080.

The previous prime is 21554610630559. The next prime is 21554610630617. The reversal of 21554610630602 is 20603601645512.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21554610630602.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7597675928 + ... + 7597678764.

It is an arithmetic number, because the mean of its divisors is an integer number (309871457280).

Almost surely, 2^{21554610630602} is an apocalyptic number.

21554610630602 is a deficient number, since it is larger than the sum of its proper divisors (18108935901238).

21554610630602 is a wasteful number, since it uses less digits than its factorization.

21554610630602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5836.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 21554610630602 in words is "twenty-one trillion, five hundred fifty-four billion, six hundred ten million, six hundred thirty thousand, six hundred two".