78743419864 has 64 divisors (see below), whose sum is σ = 152824320000. Its totient is φ = 38016010368.

The previous prime is 78743419847. The next prime is 78743419871. The reversal of 78743419864 is 46891434787.

It is a super-3 number, since 3×78743419864³ (a number of 34 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

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, 9791157 + ... + 9799195.

It is an arithmetic number, because the mean of its divisors is an integer number (2387880000).

Almost surely, 2^78743419864 is an apocalyptic number.

It is an amenable number.

78743419864 is a deficient number, since it is larger than the sum of its proper divisors (74080900136).

78743419864 is a wasteful number, since it uses less digits than its factorization.

78743419864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8440 (or 8436 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 61.

The spelling of 78743419864 in words is "seventy-eight billion, seven hundred forty-three million, four hundred nineteen thousand, eight hundred sixty-four".