80945555 has 8 divisors (see below), whose sum is σ = 97876944. Its totient is φ = 64261600.

The previous prime is 80945549. The next prime is 80945561. The reversal of 80945555 is 55554908.

It is an interprime number because it is at equal distance from previous prime (80945549) and next prime (80945561).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80945555 - 2⁸ = 80945299 is a prime.

It is a Duffinian number.

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, 61136 + ... + 62445.

It is an arithmetic number, because the mean of its divisors is an integer number (12234618).

Almost surely, 2^80945555 is an apocalyptic number.

80945555 is a deficient number, since it is larger than the sum of its proper divisors (16931389).

80945555 is a wasteful number, since it uses less digits than its factorization.

80945555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123717.

The product of its (nonzero) digits is 180000, while the sum is 41.

The square root of 80945555 is about 8996.9747693322. The cubic root of 80945555 is about 432.5779070455.

It can be divided in two parts, 809 and 45555, that added together give a palindrome (46364).

The spelling of 80945555 in words is "eighty million, nine hundred forty-five thousand, five hundred fifty-five".