21467225662656 has 28 divisors (see below), whose sum is σ = 56798701232952. Its totient is φ = 7155741887488.

The previous prime is 21467225662637. The next prime is 21467225662657. The reversal of 21467225662656 is 65626652276412.

It is a self number, because there is not a number n which added to its sum of digits gives 21467225662656.

It is not an unprimeable number, because it can be changed into a prime (21467225662657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55904233305 + ... + 55904233688.

It is an arithmetic number, because the mean of its divisors is an integer number (2028525044034).

Almost surely, 2^{21467225662656} is an apocalyptic number.

It is an amenable number.

21467225662656 is an abundant number, since it is smaller than the sum of its proper divisors (35331475570296).

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

21467225662656 is a wasteful number, since it uses less digits than its factorization.

21467225662656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111808467008 (or 111808466998 counting only the distinct ones).

The product of its digits is 87091200, while the sum is 60.

The spelling of 21467225662656 in words is "twenty-one trillion, four hundred sixty-seven billion, two hundred twenty-five million, six hundred sixty-two thousand, six hundred fifty-six".