80951620 has 24 divisors (see below), whose sum is σ = 179999064. Its totient is φ = 30475776.

The previous prime is 80951579. The next prime is 80951623. The reversal of 80951620 is 2615908.

It can be written as a sum of positive squares in 4 ways, for example, as 21013056 + 59938564 = 4584^2 + 7742^2 .

It is not an unprimeable number, because it can be changed into a prime (80951623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118707 + ... + 119386.

It is an arithmetic number, because the mean of its divisors is an integer number (7499961).

Almost surely, 2^80951620 is an apocalyptic number.

It is an amenable number.

80951620 is an abundant number, since it is smaller than the sum of its proper divisors (99047444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80951620 is a wasteful number, since it uses less digits than its factorization.

80951620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238119 (or 238117 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 80951620 is about 8997.3118207607. The cubic root of 80951620 is about 432.5887106838.

The spelling of 80951620 in words is "eighty million, nine hundred fifty-one thousand, six hundred twenty".