10501555640 has 32 divisors (see below), whose sum is σ = 23798502000. Its totient is φ = 4170399744.

The previous prime is 10501555637. The next prime is 10501555651. The reversal of 10501555640 is 4655510501.

It is a super-2 number, since 2×10501555640² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10501555597 and 10501555606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 938825 + ... + 949944.

Almost surely, 2^10501555640 is an apocalyptic number.

10501555640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10501555640 is an abundant number, since it is smaller than the sum of its proper divisors (13296946360).

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

10501555640 is a wasteful number, since it uses less digits than its factorization.

10501555640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888919 (or 1888915 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 32.

The spelling of 10501555640 in words is "ten billion, five hundred one million, five hundred fifty-five thousand, six hundred forty".