78213704700757 has 4 divisors (see below), whose sum is σ = 78215593460256. Its totient is φ = 78211815941260.

The previous prime is 78213704700727. The next prime is 78213704700767. The reversal of 78213704700757 is 75700740731287.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78213704700757 is a prime.

It is a super-2 number, since 2×78213704700757² (a number of 29 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 (78213704700727) 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, 944317633 + ... + 944400454.

It is an arithmetic number, because the mean of its divisors is an integer number (19553898365064).

Almost surely, 2^{78213704700757} is an apocalyptic number.

It is an amenable number.

78213704700757 is a deficient number, since it is larger than the sum of its proper divisors (1888759499).

78213704700757 is a wasteful number, since it uses less digits than its factorization.

78213704700757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1888759498.

The product of its (nonzero) digits is 16134720, while the sum is 58.

The spelling of 78213704700757 in words is "seventy-eight trillion, two hundred thirteen billion, seven hundred four million, seven hundred thousand, seven hundred fifty-seven".