78785525 has 24 divisors (see below), whose sum is σ = 120242304. Its totient is φ = 49867200.

The previous prime is 78785513. The next prime is 78785537. The reversal of 78785525 is 52558787.

It is an interprime number because it is at equal distance from previous prime (78785513) and next prime (78785537).

It is not a de Polignac number, because 78785525 - 2¹⁶ = 78719989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78785525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15041 + ... + 19590.

It is an arithmetic number, because the mean of its divisors is an integer number (5010096).

Almost surely, 2^78785525 is an apocalyptic number.

It is an amenable number.

78785525 is a deficient number, since it is larger than the sum of its proper divisors (41456779).

78785525 is a wasteful number, since it uses less digits than its factorization.

78785525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34661 (or 34656 counting only the distinct ones).

The product of its digits is 784000, while the sum is 47.

The square root of 78785525 is about 8876.1210559568. The cubic root of 78785525 is about 428.6953878200.

The spelling of 78785525 in words is "seventy-eight million, seven hundred eighty-five thousand, five hundred twenty-five".