78216115174648 has 32 divisors (see below), whose sum is σ = 159987915360000. Its totient is φ = 35552689169760.

The previous prime is 78216115174621. The next prime is 78216115174657. The reversal of 78216115174648 is 84647151161287.

It is a super-2 number, since 2×78216115174648² (a number of 29 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 7 ways as a sum of consecutive naturals, for example, 43692703 + ... + 45447601.

It is an arithmetic number, because the mean of its divisors is an integer number (4999622355000).

Almost surely, 2^{78216115174648} is an apocalyptic number.

It is an amenable number.

78216115174648 is an abundant number, since it is smaller than the sum of its proper divisors (81771800185352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78216115174648 is a wasteful number, since it uses less digits than its factorization.

78216115174648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2261395 (or 2261391 counting only the distinct ones).

The product of its digits is 18063360, while the sum is 61.

The spelling of 78216115174648 in words is "seventy-eight trillion, two hundred sixteen billion, one hundred fifteen million, one hundred seventy-four thousand, six hundred forty-eight".