21460660155 has 32 divisors (see below), whose sum is σ = 41620677120. Its totient is φ = 10405167840.

The previous prime is 21460660153. The next prime is 21460660159. The reversal of 21460660155 is 55106606412.

21460660155 is a `hidden beast` number, since 2 + 1 + 46 + 0 + 6 + 601 + 5 + 5 = 666.

It is not a de Polignac number, because 21460660155 - 2¹ = 21460660153 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21460660153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7224327 + ... + 7227296.

It is an arithmetic number, because the mean of its divisors is an integer number (1300646160).

Almost surely, 2^21460660155 is an apocalyptic number.

21460660155 is a deficient number, since it is larger than the sum of its proper divisors (20160016965).

21460660155 is a wasteful number, since it uses less digits than its factorization.

21460660155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14451648 (or 14451642 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 21460660155 in words is "twenty-one billion, four hundred sixty million, six hundred sixty thousand, one hundred fifty-five".