78855658672552 has 16 divisors (see below), whose sum is σ = 147870195468660. Its totient is φ = 39423606547584.

The previous prime is 78855658672529. The next prime is 78855658672559. The reversal of 78855658672552 is 25527685655887.

It can be written as a sum of positive squares in 2 ways, for example, as 75862253491236 + 2993405181316 = 8709894^2 + 1730146^2 .

It is not an unprimeable number, because it can be changed into a prime (78855658672559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 527769223 + ... + 527918614.

Almost surely, 2^{78855658672552} is an apocalyptic number.

It is an amenable number.

78855658672552 is a deficient number, since it is larger than the sum of its proper divisors (69014536796108).

78855658672552 is a wasteful number, since it uses less digits than its factorization.

78855658672552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055697180 (or 1055697176 counting only the distinct ones).

The product of its digits is 11289600000, while the sum is 79.

The spelling of 78855658672552 in words is "seventy-eight trillion, eight hundred fifty-five billion, six hundred fifty-eight million, six hundred seventy-two thousand, five hundred fifty-two".