80980215621 has 8 divisors (see below), whose sum is σ = 107979141600. Its totient is φ = 53984050032.

The previous prime is 80980215587. The next prime is 80980215661. The reversal of 80980215621 is 12651208908.

It is a happy number.

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

It is not a de Polignac number, because 80980215621 - 2²¹ = 80978118469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80980215661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 620646 + ... + 739703.

It is an arithmetic number, because the mean of its divisors is an integer number (13497392700).

Almost surely, 2^80980215621 is an apocalyptic number.

It is an amenable number.

80980215621 is a deficient number, since it is larger than the sum of its proper divisors (26998925979).

80980215621 is a wasteful number, since it uses less digits than its factorization.

80980215621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380195.

The product of its (nonzero) digits is 69120, while the sum is 42.

The spelling of 80980215621 in words is "eighty billion, nine hundred eighty million, two hundred fifteen thousand, six hundred twenty-one".