80278551 has 6 divisors (see below), whose sum is σ = 115957920. Its totient is φ = 53519028.

The previous prime is 80278547. The next prime is 80278559. The reversal of 80278551 is 15587208.

80278551 is a `hidden beast` number, since 80 + 27 + 8 + 551 = 666.

It is not a de Polignac number, because 80278551 - 2² = 80278547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80278559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4459911 + ... + 4459928.

It is an arithmetic number, because the mean of its divisors is an integer number (19326320).

Almost surely, 2^80278551 is an apocalyptic number.

80278551 is a deficient number, since it is larger than the sum of its proper divisors (35679369).

80278551 is a wasteful number, since it uses less digits than its factorization.

80278551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8919845 (or 8919842 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 80278551 is about 8959.8298532952. The cubic root of 80278551 is about 431.3864586438.

It can be divided in two parts, 80 and 278551, that added together give a triangular number (278631 = T₇₄₆).

The spelling of 80278551 in words is "eighty million, two hundred seventy-eight thousand, five hundred fifty-one".