78962788381 has 4 divisors (see below), whose sum is σ = 78965839072. Its totient is φ = 78959737692.

The previous prime is 78962788361. The next prime is 78962788447. The reversal of 78962788381 is 18388726987.

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 not a de Polignac number, because 78962788381 - 2⁷ = 78962788253 is a prime.

It is a super-2 number, since 2×78962788381² (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 (78962788361) 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, 1486185 + ... + 1538398.

It is an arithmetic number, because the mean of its divisors is an integer number (19741459768).

Almost surely, 2^78962788381 is an apocalyptic number.

It is an amenable number.

78962788381 is a deficient number, since it is larger than the sum of its proper divisors (3050691).

78962788381 is a wasteful number, since it uses less digits than its factorization.

78962788381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3050690.

The product of its digits is 65028096, while the sum is 67.

The spelling of 78962788381 in words is "seventy-eight billion, nine hundred sixty-two million, seven hundred eighty-eight thousand, three hundred eighty-one".