7825612644 has 36 divisors (see below), whose sum is σ = 20641473216. Its totient is φ = 2495122608.

The previous prime is 7825612633. The next prime is 7825612661. The reversal of 7825612644 is 4462165287.

7825612644 is a `hidden beast` number, since 7 + 8 + 25 + 612 + 6 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×7825612644² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7825612644.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4724784 + ... + 4726439.

It is an arithmetic number, because the mean of its divisors is an integer number (573374256).

Almost surely, 2^7825612644 is an apocalyptic number.

It is an amenable number.

7825612644 is an abundant number, since it is smaller than the sum of its proper divisors (12815860572).

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

7825612644 is a wasteful number, since it uses less digits than its factorization.

7825612644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9451256 (or 9451251 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 7825612644 is about 88462.4928656207. The cubic root of 7825612644 is about 1985.3608291088.

The spelling of 7825612644 in words is "seven billion, eight hundred twenty-five million, six hundred twelve thousand, six hundred forty-four".