10721640560 has 20 divisors (see below), whose sum is σ = 24927814488. Its totient is φ = 4288656192.

The previous prime is 10721640541. The next prime is 10721640571. The reversal of 10721640560 is 6504612701.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×10721640560² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67010174 + ... + 67010333.

Almost surely, 2^10721640560 is an apocalyptic number.

10721640560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10721640560 is an abundant number, since it is smaller than the sum of its proper divisors (14206173928).

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

10721640560 is a wasteful number, since it uses less digits than its factorization.

10721640560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134020520 (or 134020514 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 10721640560 in words is "ten billion, seven hundred twenty-one million, six hundred forty thousand, five hundred sixty".