1625064813 has 12 divisors (see below), whose sum is σ = 2470859040. Its totient is φ = 1026356616.

The previous prime is 1625064797. The next prime is 1625064821. The reversal of 1625064813 is 3184605261.

It is a happy number.

1625064813 is a `hidden beast` number, since 1 + 6 + 2 + 5 + 0 + 648 + 1 + 3 = 666.

It is not a de Polignac number, because 1625064813 - 2⁴ = 1625064797 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625064613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4751481 + ... + 4751822.

It is an arithmetic number, because the mean of its divisors is an integer number (205904920).

Almost surely, 2^1625064813 is an apocalyptic number.

It is an amenable number.

1625064813 is a deficient number, since it is larger than the sum of its proper divisors (845794227).

1625064813 is a wasteful number, since it uses less digits than its factorization.

1625064813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9503328 (or 9503325 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1625064813 is about 40312.0926398023. The cubic root of 1625064813 is about 1175.6829741198.

The spelling of 1625064813 in words is "one billion, six hundred twenty-five million, sixty-four thousand, eight hundred thirteen".