10265721720 has 64 divisors (see below), whose sum is σ = 31302059040. Its totient is φ = 2692646400.

The previous prime is 10265721701. The next prime is 10265721727. The reversal of 10265721720 is 2712756201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10265721727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 693891 + ... + 708530.

Almost surely, 2^10265721720 is an apocalyptic number.

10265721720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10265721720 is an abundant number, since it is smaller than the sum of its proper divisors (21036337320).

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

10265721720 is a wasteful number, since it uses less digits than its factorization.

10265721720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402496 (or 1402492 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The spelling of 10265721720 in words is "ten billion, two hundred sixty-five million, seven hundred twenty-one thousand, seven hundred twenty".