78867883958 has 4 divisors (see below), whose sum is σ = 118301825940. Its totient is φ = 39433941978.

The previous prime is 78867883951. The next prime is 78867883979. The reversal of 78867883958 is 85938876887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85938876887 = 17981 ⋅4779427.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78867883951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19716970988 + ... + 19716970991.

It is an arithmetic number, because the mean of its divisors is an integer number (29575456485).

Almost surely, 2^78867883958 is an apocalyptic number.

78867883958 is a deficient number, since it is larger than the sum of its proper divisors (39433941982).

78867883958 is a wasteful number, since it uses less digits than its factorization.

78867883958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39433941981.

The product of its digits is 1300561920, while the sum is 77.

The spelling of 78867883958 in words is "seventy-eight billion, eight hundred sixty-seven million, eight hundred eighty-three thousand, nine hundred fifty-eight".