21612231454677 has 16 divisors (see below), whose sum is σ = 29007702374400. Its totient is φ = 14312461086000.

The previous prime is 21612231454613. The next prime is 21612231454687. The reversal of 21612231454677 is 77645413221612.

It is not a de Polignac number, because 21612231454677 - 2⁶ = 21612231454613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21612231454687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24665152 + ... + 25526342.

It is an arithmetic number, because the mean of its divisors is an integer number (1812981398400).

Almost surely, 2^{21612231454677} is an apocalyptic number.

It is an amenable number.

21612231454677 is a deficient number, since it is larger than the sum of its proper divisors (7395470919723).

21612231454677 is a wasteful number, since it uses less digits than its factorization.

21612231454677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916744.

The product of its digits is 3386880, while the sum is 51.

The spelling of 21612231454677 in words is "twenty-one trillion, six hundred twelve billion, two hundred thirty-one million, four hundred fifty-four thousand, six hundred seventy-seven".