21755355355712 has 56 divisors (see below), whose sum is σ = 47624561880480. Its totient is φ = 9777687772160.

The previous prime is 21755355355691. The next prime is 21755355355739.

21755355355712 is nontrivially palindromic in base 10.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173546858 + ... + 173672169.

Almost surely, 2^{21755355355712} is an apocalyptic number.

21755355355712 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21755355355712 is an abundant number, since it is smaller than the sum of its proper divisors (25869206524768).

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

21755355355712 is a wasteful number, since it uses less digits than its factorization.

21755355355712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347219139 (or 347219129 counting only the distinct ones).

The product of its digits is 27562500, while the sum is 56.

The spelling of 21755355355712 in words is "twenty-one trillion, seven hundred fifty-five billion, three hundred fifty-five million, three hundred fifty-five thousand, seven hundred twelve".