80371507621 has 2 divisors, whose sum is σ = 80371507622. Its totient is φ = 80371507620.

The previous prime is 80371507589. The next prime is 80371507651. The reversal of 80371507621 is 12670517308.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68141359521 + 12230148100 = 261039^2 + 110590^2 .

It is a cyclic number.

It is not a de Polignac number, because 80371507621 - 2⁵ = 80371507589 is a prime.

It is a super-2 number, since 2×80371507621² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80371507651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40185753810 + 40185753811.

It is an arithmetic number, because the mean of its divisors is an integer number (40185753811).

Almost surely, 2^80371507621 is an apocalyptic number.

It is an amenable number.

80371507621 is a deficient number, since it is larger than the sum of its proper divisors (1).

80371507621 is an equidigital number, since it uses as much as digits as its factorization.

80371507621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 80371507621 in words is "eighty billion, three hundred seventy-one million, five hundred seven thousand, six hundred twenty-one".