21229440616662 has 16 divisors (see below), whose sum is σ = 42459748488192. Its totient is φ = 7076335663080.

The previous prime is 21229440616661. The next prime is 21229440616663. The reversal of 21229440616662 is 26661604492212.

It is an interprime number because it is at equal distance from previous prime (21229440616661) and next prime (21229440616663).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21229440616661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35817178 + ... + 36405069.

It is an arithmetic number, because the mean of its divisors is an integer number (2653734280512).

Almost surely, 2^{21229440616662} is an apocalyptic number.

21229440616662 is an abundant number, since it is smaller than the sum of its proper divisors (21230307871530).

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

21229440616662 is a wasteful number, since it uses less digits than its factorization.

21229440616662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72271243.

The product of its (nonzero) digits is 2985984, while the sum is 51.

The spelling of 21229440616662 in words is "twenty-one trillion, two hundred twenty-nine billion, four hundred forty million, six hundred sixteen thousand, six hundred sixty-two".