78261479084 has 12 divisors (see below), whose sum is σ = 138369522984. Its totient is φ = 38727329664.

The previous prime is 78261479057. The next prime is 78261479099. The reversal of 78261479084 is 48097416287.

It is a super-2 number, since 2×78261479084² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100852034 + ... + 100852809.

It is an arithmetic number, because the mean of its divisors is an integer number (11530793582).

Almost surely, 2^78261479084 is an apocalyptic number.

It is an amenable number.

78261479084 is a deficient number, since it is larger than the sum of its proper divisors (60108043900).

78261479084 is a wasteful number, since it uses less digits than its factorization.

78261479084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201704944 (or 201704942 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 56.

The spelling of 78261479084 in words is "seventy-eight billion, two hundred sixty-one million, four hundred seventy-nine thousand, eighty-four".