78772044357 has 6 divisors (see below), whose sum is σ = 113781841862. Its totient is φ = 52514696232.

The previous prime is 78772044353. The next prime is 78772044383. The reversal of 78772044357 is 75344027787.

78772044357 is a `hidden beast` number, since 7 + 87 + 7 + 204 + 4 + 357 = 666.

It can be written as a sum of positive squares in only one way, i.e., 42369693921 + 36402350436 = 205839^2 + 190794^2 .

It is not a de Polignac number, because 78772044357 - 2² = 78772044353 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78772044353) 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, 4376224678 + ... + 4376224695.

Almost surely, 2^78772044357 is an apocalyptic number.

It is an amenable number.

78772044357 is a deficient number, since it is larger than the sum of its proper divisors (35009797505).

78772044357 is a wasteful number, since it uses less digits than its factorization.

78772044357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8752449379 (or 8752449376 counting only the distinct ones).

The product of its (nonzero) digits is 9219840, while the sum is 54.

The spelling of 78772044357 in words is "seventy-eight billion, seven hundred seventy-two million, forty-four thousand, three hundred fifty-seven".