21361264362456 has 64 divisors (see below), whose sum is σ = 53602502353920. Its totient is φ = 7093844835840.

The previous prime is 21361264362439. The next prime is 21361264362467. The reversal of 21361264362456 is 65426346216312.

It is a junction number, because it is equal to n+sod(n) for n = 21361264362399 and 21361264362408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194239021 + ... + 194348963.

It is an arithmetic number, because the mean of its divisors is an integer number (837539099280).

Almost surely, 2^{21361264362456} is an apocalyptic number.

It is an amenable number.

21361264362456 is an abundant number, since it is smaller than the sum of its proper divisors (32241237991464).

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

21361264362456 is a wasteful number, since it uses less digits than its factorization.

21361264362456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140096 (or 140092 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 51.

The spelling of 21361264362456 in words is "twenty-one trillion, three hundred sixty-one billion, two hundred sixty-four million, three hundred sixty-two thousand, four hundred fifty-six".