147777317631 has 6 divisors (see below), whose sum is σ = 213456125480. Its totient is φ = 98518211748.

The previous prime is 147777317591. The next prime is 147777317651. The reversal of 147777317631 is 136713777741.

147777317631 is a `hidden beast` number, since 1 + 477 + 7 + 73 + 1 + 76 + 31 = 666.

It is not a de Polignac number, because 147777317631 - 2¹⁴ = 147777301247 is a prime.

It is a super-2 number, since 2×147777317631² (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 (147777317651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8209850971 + ... + 8209850988.

Almost surely, 2^147777317631 is an apocalyptic number.

147777317631 is a deficient number, since it is larger than the sum of its proper divisors (65678807849).

147777317631 is a wasteful number, since it uses less digits than its factorization.

147777317631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16419701965 (or 16419701962 counting only the distinct ones).

The product of its digits is 3630312, while the sum is 54.

The spelling of 147777317631 in words is "one hundred forty-seven billion, seven hundred seventy-seven million, three hundred seventeen thousand, six hundred thirty-one".