80642555 has 16 divisors (see below), whose sum is σ = 116417280. Its totient is φ = 52386912.

The previous prime is 80642539. The next prime is 80642567. The reversal of 80642555 is 55524608.

It is a cyclic number.

It is not a de Polignac number, because 80642555 - 2⁴ = 80642539 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59969 + ... + 61298.

It is an arithmetic number, because the mean of its divisors is an integer number (7276080).

Almost surely, 2^80642555 is an apocalyptic number.

80642555 is a deficient number, since it is larger than the sum of its proper divisors (35774725).

80642555 is a wasteful number, since it uses less digits than its factorization.

80642555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121298.

The product of its (nonzero) digits is 48000, while the sum is 35.

The square root of 80642555 is about 8980.1199880625. The cubic root of 80642555 is about 432.0374821016.

The spelling of 80642555 in words is "eighty million, six hundred forty-two thousand, five hundred fifty-five".