772630213644 has 18 divisors (see below), whose sum is σ = 1953037484580. Its totient is φ = 257543404536.

The previous prime is 772630213631. The next prime is 772630213687. The reversal of 772630213644 is 446312036277.

772630213644 is a `hidden beast` number, since 7 + 7 + 2 + 630 + 2 + 1 + 3 + 6 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 772630213644.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 10730975154 + ... + 10730975225.

Almost surely, 2^772630213644 is an apocalyptic number.

It is an amenable number.

772630213644 is an abundant number, since it is smaller than the sum of its proper divisors (1180407270936).

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

772630213644 is a wasteful number, since it uses less digits than its factorization.

772630213644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21461950389 (or 21461950384 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 45.

The spelling of 772630213644 in words is "seven hundred seventy-two billion, six hundred thirty million, two hundred thirteen thousand, six hundred forty-four".