21554610630662 has 4 divisors (see below), whose sum is σ = 32331915945996. Its totient is φ = 10777305315330.

The previous prime is 21554610630617. The next prime is 21554610630697. The reversal of 21554610630662 is 26603601645512.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5388652657664 + ... + 5388652657667.

It is an arithmetic number, because the mean of its divisors is an integer number (8082978986499).

Almost surely, 2^{21554610630662} is an apocalyptic number.

21554610630662 is a deficient number, since it is larger than the sum of its proper divisors (10777305315334).

21554610630662 is a wasteful number, since it uses less digits than its factorization.

21554610630662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10777305315333.

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 21554610630662 in words is "twenty-one trillion, five hundred fifty-four billion, six hundred ten million, six hundred thirty thousand, six hundred sixty-two".