70620650644 has 6 divisors (see below), whose sum is σ = 123586138634. Its totient is φ = 35310325320.

The previous prime is 70620650609. The next prime is 70620650677. The reversal of 70620650644 is 44605602607.

It can be written as a sum of positive squares in only one way, i.e., 66703392900 + 3917257744 = 258270^2 + 62588^2 .

It is a super-2 number, since 2×70620650644² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 70620650597 and 70620650606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8827581327 + ... + 8827581334.

Almost surely, 2^70620650644 is an apocalyptic number.

It is an amenable number.

70620650644 is a deficient number, since it is larger than the sum of its proper divisors (52965487990).

70620650644 is a wasteful number, since it uses less digits than its factorization.

70620650644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17655162665 (or 17655162663 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 70620650644 in words is "seventy billion, six hundred twenty million, six hundred fifty thousand, six hundred forty-four".