49178686864 has 10 divisors (see below), whose sum is σ = 95283705830. Its totient is φ = 24589343424.

The previous prime is 49178686853. The next prime is 49178686867. The reversal of 49178686864 is 46868687194.

49178686864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 36343609600 + 12835077264 = 190640^2 + 113292^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 49178686864.

It is not an unprimeable number, because it can be changed into a prime (49178686867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1536833949 + ... + 1536833980.

It is an arithmetic number, because the mean of its divisors is an integer number (9528370583).

Almost surely, 2^49178686864 is an apocalyptic number.

It is an amenable number.

49178686864 is a deficient number, since it is larger than the sum of its proper divisors (46105018966).

49178686864 is a wasteful number, since it uses less digits than its factorization.

49178686864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3073667937 (or 3073667931 counting only the distinct ones).

The product of its digits is 111476736, while the sum is 67.

The spelling of 49178686864 in words is "forty-nine billion, one hundred seventy-eight million, six hundred eighty-six thousand, eight hundred sixty-four".