78255750079 has 8 divisors (see below), whose sum is σ = 84716658432. Its totient is φ = 71857875360.

The previous prime is 78255750047. The next prime is 78255750109. The reversal of 78255750079 is 97005755287.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78255750079 - 2⁵ = 78255750047 is a prime.

It is a super-2 number, since 2×78255750079² (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 (78255750029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15755824 + ... + 15760789.

It is an arithmetic number, because the mean of its divisors is an integer number (10589582304).

Almost surely, 2^78255750079 is an apocalyptic number.

78255750079 is a deficient number, since it is larger than the sum of its proper divisors (6460908353).

78255750079 is a wasteful number, since it uses less digits than its factorization.

78255750079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31516817.

The product of its (nonzero) digits is 6174000, while the sum is 55.

The spelling of 78255750079 in words is "seventy-eight billion, two hundred fifty-five million, seven hundred fifty thousand, seventy-nine".