78470455731 has 8 divisors (see below), whose sum is σ = 104765490384. Its totient is φ = 52244529120.

The previous prime is 78470455711. The next prime is 78470455733. The reversal of 78470455731 is 13755407487.

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

It is not a de Polignac number, because 78470455731 - 2¹¹ = 78470453683 is a prime.

It is a super-2 number, since 2×78470455731² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (78470455733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17274360 + ... + 17278901.

It is an arithmetic number, because the mean of its divisors is an integer number (13095686298).

Almost surely, 2^78470455731 is an apocalyptic number.

78470455731 is a deficient number, since it is larger than the sum of its proper divisors (26295034653).

78470455731 is a wasteful number, since it uses less digits than its factorization.

78470455731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34554021.

The product of its (nonzero) digits is 3292800, while the sum is 51.

The spelling of 78470455731 in words is "seventy-eight billion, four hundred seventy million, four hundred fifty-five thousand, seven hundred thirty-one".