78655234731 has 8 divisors (see below), whose sum is σ = 104875766784. Its totient is φ = 52435762920.

The previous prime is 78655234703. The next prime is 78655234771. The reversal of 78655234731 is 13743255687.

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

It is not a de Polignac number, because 78655234731 - 2¹⁴ = 78655218347 is a prime.

It is a super-2 number, since 2×78655234731² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78655234771) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 71835 + ... + 403076.

It is an arithmetic number, because the mean of its divisors is an integer number (13109470848).

Almost surely, 2^78655234731 is an apocalyptic number.

78655234731 is a deficient number, since it is larger than the sum of its proper divisors (26220532053).

78655234731 is a wasteful number, since it uses less digits than its factorization.

78655234731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530121.

The product of its digits is 4233600, while the sum is 51.

The spelling of 78655234731 in words is "seventy-eight billion, six hundred fifty-five million, two hundred thirty-four thousand, seven hundred thirty-one".