10721437857 has 64 divisors (see below), whose sum is σ = 18260121600. Its totient is φ = 6162246720.

The previous prime is 10721437829. The next prime is 10721437861. The reversal of 10721437857 is 75873412701.

10721437857 is a `hidden beast` number, since 10 + 7 + 214 + 378 + 57 = 666.

It is not a de Polignac number, because 10721437857 - 2⁷ = 10721437729 is a prime.

It is a super-2 number, since 2×10721437857² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10721437157) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 462178 + ... + 484820.

It is an arithmetic number, because the mean of its divisors is an integer number (285314400).

Almost surely, 2^10721437857 is an apocalyptic number.

It is an amenable number.

10721437857 is a deficient number, since it is larger than the sum of its proper divisors (7538683743).

10721437857 is a wasteful number, since it uses less digits than its factorization.

10721437857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22755 (or 22749 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The spelling of 10721437857 in words is "ten billion, seven hundred twenty-one million, four hundred thirty-seven thousand, eight hundred fifty-seven".