78298309486 has 32 divisors (see below), whose sum is σ = 120409368768. Its totient is φ = 38175287040.

The previous prime is 78298309477. The next prime is 78298309519. The reversal of 78298309486 is 68490389287.

It is a super-2 number, since 2×78298309486² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9936180 + ... + 9944056.

It is an arithmetic number, because the mean of its divisors is an integer number (3762792774).

Almost surely, 2^78298309486 is an apocalyptic number.

78298309486 is a deficient number, since it is larger than the sum of its proper divisors (42111059282).

78298309486 is a wasteful number, since it uses less digits than its factorization.

78298309486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8716.

The product of its (nonzero) digits is 41803776, while the sum is 64.

The spelling of 78298309486 in words is "seventy-eight billion, two hundred ninety-eight million, three hundred nine thousand, four hundred eighty-six".