10656401643 has 24 divisors (see below), whose sum is σ = 15732288000. Its totient is φ = 6948692784.

The previous prime is 10656401629. The next prime is 10656401647. The reversal of 10656401643 is 34610465601.

It is a happy number.

10656401643 is a `hidden beast` number, since 1 + 0 + 6 + 5 + 6 + 4 + 0 + 1 + 643 = 666.

It is not a de Polignac number, because 10656401643 - 2⁹ = 10656401131 is a prime.

It is a super-2 number, since 2×10656401643² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10656401598 and 10656401607.

It is not an unprimeable number, because it can be changed into a prime (10656401647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55246 + ... + 156092.

It is an arithmetic number, because the mean of its divisors is an integer number (655512000).

Almost surely, 2^10656401643 is an apocalyptic number.

10656401643 is a deficient number, since it is larger than the sum of its proper divisors (5075886357).

10656401643 is a wasteful number, since it uses less digits than its factorization.

10656401643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101111 (or 101108 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 10656401643 in words is "ten billion, six hundred fifty-six million, four hundred one thousand, six hundred forty-three".