21651612614303 has 16 divisors (see below), whose sum is σ = 24800160813120. Its totient is φ = 18516935385600.

The previous prime is 21651612614299. The next prime is 21651612614377. The reversal of 21651612614303 is 30341621615612.

It is a cyclic number.

It is not a de Polignac number, because 21651612614303 - 2² = 21651612614299 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21651612614003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45979613 + ... + 46448121.

It is an arithmetic number, because the mean of its divisors is an integer number (1550010050820).

Almost surely, 2^{21651612614303} is an apocalyptic number.

21651612614303 is a deficient number, since it is larger than the sum of its proper divisors (3148548198817).

21651612614303 is a wasteful number, since it uses less digits than its factorization.

21651612614303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483298.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 21651612614303 in words is "twenty-one trillion, six hundred fifty-one billion, six hundred twelve million, six hundred fourteen thousand, three hundred three".