78670743775 has 12 divisors (see below), whose sum is σ = 105055701352. Its totient is φ = 58095318240.

The previous prime is 78670743773. The next prime is 78670743791. The reversal of 78670743775 is 57734707687.

It is not a de Polignac number, because 78670743775 - 2¹ = 78670743773 is a prime.

It is a super-2 number, since 2×78670743775² (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 (78670743773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121031589 + ... + 121032238.

Almost surely, 2^78670743775 is an apocalyptic number.

78670743775 is a deficient number, since it is larger than the sum of its proper divisors (26384957577).

78670743775 is a wasteful number, since it uses less digits than its factorization.

78670743775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242063850 (or 242063845 counting only the distinct ones).

The product of its (nonzero) digits is 48404160, while the sum is 61.

The spelling of 78670743775 in words is "seventy-eight billion, six hundred seventy million, seven hundred forty-three thousand, seven hundred seventy-five".