78285732404 has 72 divisors (see below), whose sum is σ = 154444766784. Its totient is φ = 34676611200.

The previous prime is 78285732373. The next prime is 78285732451. The reversal of 78285732404 is 40423758287.

It is a super-2 number, since 2×78285732404² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9506969 + ... + 9515199.

Almost surely, 2^78285732404 is an apocalyptic number.

It is an amenable number.

78285732404 is a deficient number, since it is larger than the sum of its proper divisors (76159034380).

78285732404 is a wasteful number, since it uses less digits than its factorization.

78285732404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8757 (or 8744 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 50.

The spelling of 78285732404 in words is "seventy-eight billion, two hundred eighty-five million, seven hundred thirty-two thousand, four hundred four".