21546104616 has 48 divisors (see below), whose sum is σ = 58604525460. Its totient is φ = 7151205120.

The previous prime is 21546104551. The next prime is 21546104639. The reversal of 21546104616 is 61640164512.

21546104616 is a `hidden beast` number, since 2 + 1 + 546 + 104 + 6 + 1 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16888042116 + 4658062500 = 129954^2 + 68250^2 .

It is a super-3 number, since 3×21546104616³ (a number of 32 digits) contains 333 as substring.

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 a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 625395 + ... + 658946.

Almost surely, 2^21546104616 is an apocalyptic number.

It is an amenable number.

21546104616 is an abundant number, since it is smaller than the sum of its proper divisors (37058420844).

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

21546104616 is a wasteful number, since it uses less digits than its factorization.

21546104616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284586 (or 1284579 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 21546104616 in words is "twenty-one billion, five hundred forty-six million, one hundred four thousand, six hundred sixteen".