478995851731 has 4 divisors (see below), whose sum is σ = 499821758352. Its totient is φ = 458169945112.

The previous prime is 478995851713. The next prime is 478995851749. The reversal of 478995851731 is 137158599874.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137158599874 = 2 ⋅68579299937.

It is an interprime number because it is at equal distance from previous prime (478995851713) and next prime (478995851749).

It is a cyclic number.

It is not a de Polignac number, because 478995851731 - 2¹⁵ = 478995818963 is a prime.

It is a super-2 number, since 2×478995851731² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478995857731) 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, 10412953276 + ... + 10412953321.

It is an arithmetic number, because the mean of its divisors is an integer number (124955439588).

Almost surely, 2^478995851731 is an apocalyptic number.

478995851731 is a deficient number, since it is larger than the sum of its proper divisors (20825906621).

478995851731 is a wasteful number, since it uses less digits than its factorization.

478995851731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20825906620.

The product of its digits is 76204800, while the sum is 67.

The spelling of 478995851731 in words is "four hundred seventy-eight billion, nine hundred ninety-five million, eight hundred fifty-one thousand, seven hundred thirty-one".