78477253537 has 8 divisors (see below), whose sum is σ = 78856043904. Its totient is φ = 78099072768.

The previous prime is 78477253513. The next prime is 78477253627. The reversal of 78477253537 is 73535277487.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78477253537 - 2²⁷ = 78343035809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78477253037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106753 + ... + 410305.

It is an arithmetic number, because the mean of its divisors is an integer number (9857005488).

Almost surely, 2^78477253537 is an apocalyptic number.

It is an amenable number.

78477253537 is a deficient number, since it is larger than the sum of its proper divisors (378790367).

78477253537 is a wasteful number, since it uses less digits than its factorization.

78477253537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304799.

The product of its digits is 34574400, while the sum is 58.

The spelling of 78477253537 in words is "seventy-eight billion, four hundred seventy-seven million, two hundred fifty-three thousand, five hundred thirty-seven".