78802135461 has 36 divisors (see below), whose sum is σ = 138188343072. Its totient is φ = 42380970624.

The previous prime is 78802135459. The next prime is 78802135513. The reversal of 78802135461 is 16453120887.

78802135461 is a `hidden beast` number, since 7 + 8 + 80 + 21 + 3 + 546 + 1 = 666.

It is not a de Polignac number, because 78802135461 - 2¹ = 78802135459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78802135421) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2145855 + ... + 2182268.

Almost surely, 2^78802135461 is an apocalyptic number.

It is an amenable number.

78802135461 is a deficient number, since it is larger than the sum of its proper divisors (59386207611).

78802135461 is a wasteful number, since it uses less digits than its factorization.

78802135461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4328170 (or 4328150 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 78802135461 in words is "seventy-eight billion, eight hundred two million, one hundred thirty-five thousand, four hundred sixty-one".