78157525 has 12 divisors (see below), whose sum is σ = 97266592. Its totient is φ = 62299440.

The previous prime is 78157501. The next prime is 78157529. The reversal of 78157525 is 52575187.

It is not a de Polignac number, because 78157525 - 2¹³ = 78149333 is a prime.

It is a super-2 number, since 2×78157525² = 12217197428251250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78157529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1552 + ... + 12598.

Almost surely, 2^78157525 is an apocalyptic number.

It is an amenable number.

78157525 is a deficient number, since it is larger than the sum of its proper divisors (19109067).

78157525 is a wasteful number, since it uses less digits than its factorization.

78157525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11340 (or 11335 counting only the distinct ones).

The product of its digits is 98000, while the sum is 40.

The square root of 78157525 is about 8840.6744652204. The cubic root of 78157525 is about 427.5533032039.

The spelling of 78157525 in words is "seventy-eight million, one hundred fifty-seven thousand, five hundred twenty-five".