80377557421957 has 2 divisors, whose sum is σ = 80377557421958. Its totient is φ = 80377557421956.

The previous prime is 80377557421951. The next prime is 80377557421981. The reversal of 80377557421957 is 75912475577308.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78774393744036 + 1603163677921 = 8875494^2 + 1266161^2 .

It is a cyclic number.

It is not a de Polignac number, because 80377557421957 - 2¹¹ = 80377557419909 is a prime.

It is a super-2 number, since 2×80377557421957² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80377557421951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40188778710978 + 40188778710979.

It is an arithmetic number, because the mean of its divisors is an integer number (40188778710979).

Almost surely, 2^{80377557421957} is an apocalyptic number.

It is an amenable number.

80377557421957 is a deficient number, since it is larger than the sum of its proper divisors (1).

80377557421957 is an equidigital number, since it uses as much as digits as its factorization.

80377557421957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518616000, while the sum is 70.

The spelling of 80377557421957 in words is "eighty trillion, three hundred seventy-seven billion, five hundred fifty-seven million, four hundred twenty-one thousand, nine hundred fifty-seven".