71625915 has 24 divisors (see below), whose sum is σ = 130687440. Its totient is φ = 36189504.

The previous prime is 71625889. The next prime is 71625919. The reversal of 71625915 is 51952617.

71625915 is a `hidden beast` number, since 7 + 1 + 62 + 591 + 5 = 666.

It is not a de Polignac number, because 71625915 - 2¹⁸ = 71363771 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71625915.

It is not an unprimeable number, because it can be changed into a prime (71625919) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41032 + ... + 42741.

It is an arithmetic number, because the mean of its divisors is an integer number (5445310).

Almost surely, 2^71625915 is an apocalyptic number.

71625915 is a deficient number, since it is larger than the sum of its proper divisors (59061525).

71625915 is a wasteful number, since it uses less digits than its factorization.

71625915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83803 (or 83800 counting only the distinct ones).

The product of its digits is 18900, while the sum is 36.

The square root of 71625915 is about 8463.2094975842. The cubic root of 71625915 is about 415.2950241650.

The spelling of 71625915 in words is "seventy-one million, six hundred twenty-five thousand, nine hundred fifteen".