78644403316 has 48 divisors (see below), whose sum is σ = 145952851968. Its totient is φ = 37020060000.

The previous prime is 78644403311. The next prime is 78644403377. The reversal of 78644403316 is 61330444687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78644403311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1308951 + ... + 1367713.

It is an arithmetic number, because the mean of its divisors is an integer number (3040684416).

Almost surely, 2^78644403316 is an apocalyptic number.

It is an amenable number.

78644403316 is a deficient number, since it is larger than the sum of its proper divisors (67308448652).

78644403316 is a wasteful number, since it uses less digits than its factorization.

78644403316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59092 (or 59090 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 46.

The spelling of 78644403316 in words is "seventy-eight billion, six hundred forty-four million, four hundred three thousand, three hundred sixteen".