80557961 has 8 divisors (see below), whose sum is σ = 88409664. Its totient is φ = 72794320.

The previous prime is 80557957. The next prime is 80557973. The reversal of 80557961 is 16975508.

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

It is a cyclic number.

It is not a de Polignac number, because 80557961 - 2² = 80557957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80557261) 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, 20090 + ... + 23763.

It is an arithmetic number, because the mean of its divisors is an integer number (11051208).

Almost surely, 2^80557961 is an apocalyptic number.

It is an amenable number.

80557961 is a deficient number, since it is larger than the sum of its proper divisors (7851703).

80557961 is a wasteful number, since it uses less digits than its factorization.

80557961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44031.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 80557961 is about 8975.4086815030. The cubic root of 80557961 is about 431.8863602126.

It can be divided in two parts, 80557 and 961, that added together give a palindrome (81518).

The spelling of 80557961 in words is "eighty million, five hundred fifty-seven thousand, nine hundred sixty-one".