78521496 has 32 divisors (see below), whose sum is σ = 198514800. Its totient is φ = 25879040.

The previous prime is 78521479. The next prime is 78521503. The reversal of 78521496 is 69412587.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16245 + ... + 20516.

Almost surely, 2^78521496 is an apocalyptic number.

It is an amenable number.

78521496 is an abundant number, since it is smaller than the sum of its proper divisors (119993304).

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

78521496 is a wasteful number, since it uses less digits than its factorization.

78521496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36859 (or 36855 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 78521496 is about 8861.2355797597. The cubic root of 78521496 is about 428.2159651915.

The spelling of 78521496 in words is "seventy-eight million, five hundred twenty-one thousand, four hundred ninety-six".