78471467621264 has 40 divisors (see below), whose sum is σ = 153434993040120. Its totient is φ = 38875348251648.

The previous prime is 78471467621249. The next prime is 78471467621269. The reversal of 78471467621264 is 46212676417487.

It can be written as a sum of positive squares in 4 ways, for example, as 1036747531264 + 77434720090000 = 1018208^2 + 8799700^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 78471467621264.

It is not an unprimeable number, because it can be changed into a prime (78471467621269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211949972 + ... + 212319884.

It is an arithmetic number, because the mean of its divisors is an integer number (3835874826003).

Almost surely, 2^{78471467621264} is an apocalyptic number.

It is an amenable number.

78471467621264 is a deficient number, since it is larger than the sum of its proper divisors (74963525418856).

78471467621264 is a wasteful number, since it uses less digits than its factorization.

78471467621264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491667 (or 491661 counting only the distinct ones).

The product of its digits is 151732224, while the sum is 65.

The spelling of 78471467621264 in words is "seventy-eight trillion, four hundred seventy-one billion, four hundred sixty-seven million, six hundred twenty-one thousand, two hundred sixty-four".