78468388616776 has 32 divisors (see below), whose sum is σ = 148293109706040. Its totient is φ = 38924775157248.

The previous prime is 78468388616767. The next prime is 78468388616789. The reversal of 78468388616776 is 67761688386487.

It can be written as a sum of positive squares in 4 ways, for example, as 62340341448100 + 16128047168676 = 7895590^2 + 4015974^2 .

It is a super-2 number, since 2×78468388616776² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78468388616693 and 78468388616702.

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, 75470631 + ... + 76503286.

Almost surely, 2^{78468388616776} is an apocalyptic number.

It is an amenable number.

78468388616776 is a deficient number, since it is larger than the sum of its proper divisors (69824721089264).

78468388616776 is a wasteful number, since it uses less digits than its factorization.

78468388616776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151974433 (or 151974429 counting only the distinct ones).

The product of its digits is 21849440256, while the sum is 85.

The spelling of 78468388616776 in words is "seventy-eight trillion, four hundred sixty-eight billion, three hundred eighty-eight million, six hundred sixteen thousand, seven hundred seventy-six".