78354480544 has 24 divisors (see below), whose sum is σ = 154303026948. Its totient is φ = 39166410240.

The previous prime is 78354480527. The next prime is 78354480557. The reversal of 78354480544 is 44508445387.

It can be written as a sum of positive squares in 2 ways, for example, as 78182870544 + 171610000 = 279612^2 + 13100^2 .

It is a super-2 number, since 2×78354480544² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 78354480491 and 78354480500.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220237 + ... + 453004.

Almost surely, 2^78354480544 is an apocalyptic number.

It is an amenable number.

78354480544 is a deficient number, since it is larger than the sum of its proper divisors (75948546404).

78354480544 is a wasteful number, since it uses less digits than its factorization.

78354480544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676888 (or 676880 counting only the distinct ones).

The product of its (nonzero) digits is 8601600, while the sum is 52.

The spelling of 78354480544 in words is "seventy-eight billion, three hundred fifty-four million, four hundred eighty thousand, five hundred forty-four".