10621555012 has 6 divisors (see below), whose sum is σ = 18587721278. Its totient is φ = 5310777504.

The previous prime is 10621554989. The next prime is 10621555027. The reversal of 10621555012 is 21055512601.

It can be written as a sum of positive squares in only one way, i.e., 5326664256 + 5294890756 = 72984^2 + 72766^2 .

It is a super-2 number, since 2×10621555012² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1327694373 + ... + 1327694380.

Almost surely, 2^10621555012 is an apocalyptic number.

It is an amenable number.

10621555012 is a deficient number, since it is larger than the sum of its proper divisors (7966166266).

10621555012 is a wasteful number, since it uses less digits than its factorization.

10621555012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2655388757 (or 2655388755 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 10621555012 in words is "ten billion, six hundred twenty-one million, five hundred fifty-five thousand, twelve".