80861751 has 24 divisors (see below), whose sum is σ = 119049840. Its totient is φ = 52880256.

The previous prime is 80861749. The next prime is 80861779. The reversal of 80861751 is 15716808.

It is not a de Polignac number, because 80861751 - 2¹ = 80861749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80861731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125436 + ... + 126078.

It is an arithmetic number, because the mean of its divisors is an integer number (4960410).

Almost surely, 2^80861751 is an apocalyptic number.

80861751 is a deficient number, since it is larger than the sum of its proper divisors (38188089).

80861751 is a wasteful number, since it uses less digits than its factorization.

80861751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The square root of 80861751 is about 8992.3162199736. The cubic root of 80861751 is about 432.4285709608.

The spelling of 80861751 in words is "eighty million, eight hundred sixty-one thousand, seven hundred fifty-one".