148778864631 has 12 divisors (see below), whose sum is σ = 214934538000. Its totient is φ = 99171263520.

The previous prime is 148778864599. The next prime is 148778864669. The reversal of 148778864631 is 136468877841.

148778864631 is a `hidden beast` number, since 1 + 487 + 7 + 8 + 86 + 46 + 31 = 666.

It is not a de Polignac number, because 148778864631 - 2⁵ = 148778864599 is a prime.

It is a super-2 number, since 2×148778864631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148778864681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1156006 + ... + 1278243.

It is an arithmetic number, because the mean of its divisors is an integer number (17911211500).

Almost surely, 2^148778864631 is an apocalyptic number.

148778864631 is a deficient number, since it is larger than the sum of its proper divisors (66155673369).

148778864631 is a wasteful number, since it uses less digits than its factorization.

148778864631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2441046 (or 2441043 counting only the distinct ones).

The product of its digits is 43352064, while the sum is 63.

The spelling of 148778864631 in words is "one hundred forty-eight billion, seven hundred seventy-eight million, eight hundred sixty-four thousand, six hundred thirty-one".