78452088649 has 9 divisors (see below), whose sum is σ = 86235847789. Its totient is φ = 71317279660.

The previous prime is 78452088571. The next prime is 78452088691. The reversal of 78452088649 is 94688025487.

The square root of 78452088649 is 280093.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 78452088649 - 2¹⁹ = 78451564361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78452083649) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3068292 + ... + 3093754.

Almost surely, 2^78452088649 is an apocalyptic number.

78452088649 is the 280093-rd square number.

78452088649 is the 140047-th centered octagonal number.

It is an amenable number.

78452088649 is a deficient number, since it is larger than the sum of its proper divisors (7783759140).

78452088649 is an frugal number, since it uses more digits than its factorization.

78452088649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50948 (or 25474 counting only the distinct ones).

The product of its (nonzero) digits is 30965760, while the sum is 61.

The spelling of 78452088649 in words is "seventy-eight billion, four hundred fifty-two million, eighty-eight thousand, six hundred forty-nine".