78522453 has 20 divisors (see below), whose sum is σ = 117566988. Its totient is φ = 52228800.

The previous prime is 78522413. The next prime is 78522481. The reversal of 78522453 is 35422587.

It can be written as a sum of positive squares in 2 ways, for example, as 58110129 + 20412324 = 7623^2 + 4518^2 .

It is not a de Polignac number, because 78522453 - 2¹² = 78518357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78522413) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 47875 + ... + 49487.

Almost surely, 2^78522453 is an apocalyptic number.

It is an amenable number.

78522453 is a deficient number, since it is larger than the sum of its proper divisors (39044535).

78522453 is a wasteful number, since it uses less digits than its factorization.

78522453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2226 (or 2217 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 78522453 is about 8861.2895788367. The cubic root of 78522453 is about 428.2177048468.

The spelling of 78522453 in words is "seventy-eight million, five hundred twenty-two thousand, four hundred fifty-three".