10656410456421 has 12 divisors (see below), whose sum is σ = 15392633600448. Its totient is φ = 7104254844264.

The previous prime is 10656410456413. The next prime is 10656410456423. The reversal of 10656410456421 is 12465401465601.

10656410456421 is a `hidden beast` number, since 1 + 0 + 6 + 5 + 64 + 1 + 0 + 4 + 564 + 21 = 666.

It is not a de Polignac number, because 10656410456421 - 2³ = 10656410456413 is a prime.

It is a super-2 number, since 2×10656410456421² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10656410456423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2611636 + ... + 5304098.

It is an arithmetic number, because the mean of its divisors is an integer number (1282719466704).

Almost surely, 2^{10656410456421} is an apocalyptic number.

It is an amenable number.

10656410456421 is a deficient number, since it is larger than the sum of its proper divisors (4736223144027).

10656410456421 is a wasteful number, since it uses less digits than its factorization.

10656410456421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3132232 (or 3132229 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 10656410456421 in words is "ten trillion, six hundred fifty-six billion, four hundred ten million, four hundred fifty-six thousand, four hundred twenty-one".