78701494831 has 4 divisors (see below), whose sum is σ = 78780912064. Its totient is φ = 78622077600.

The previous prime is 78701494811. The next prime is 78701494843. The reversal of 78701494831 is 13849410787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13849410787 = 41 ⋅337790507.

It is a cyclic number.

It is not a de Polignac number, because 78701494831 - 2¹⁷ = 78701363759 is a prime.

It is a super-2 number, since 2×78701494831² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78701494811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39707130 + ... + 39709111.

It is an arithmetic number, because the mean of its divisors is an integer number (19695228016).

Almost surely, 2^78701494831 is an apocalyptic number.

78701494831 is a deficient number, since it is larger than the sum of its proper divisors (79417233).

78701494831 is an equidigital number, since it uses as much as digits as its factorization.

78701494831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79417232.

The product of its (nonzero) digits is 1354752, while the sum is 52.

The spelling of 78701494831 in words is "seventy-eight billion, seven hundred one million, four hundred ninety-four thousand, eight hundred thirty-one".