157775655180581 has 2 divisors, whose sum is σ = 157775655180582. Its totient is φ = 157775655180580.

The previous prime is 157775655180551. The next prime is 157775655180587. The reversal of 157775655180581 is 185081556577751.

157775655180581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141432959568481 + 16342695612100 = 11892559^2 + 4042610^2 .

It is a cyclic number.

It is not a de Polignac number, because 157775655180581 - 2¹⁸ = 157775654918437 is a prime.

It is a super-2 number, since 2×157775655180581² (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 (157775655180587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78887827590290 + 78887827590291.

It is an arithmetic number, because the mean of its divisors is an integer number (78887827590291).

Almost surely, 2^{157775655180581} is an apocalyptic number.

It is an amenable number.

157775655180581 is a deficient number, since it is larger than the sum of its proper divisors (1).

157775655180581 is an equidigital number, since it uses as much as digits as its factorization.

157775655180581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 411600000, while the sum is 71.

The spelling of 157775655180581 in words is "one hundred fifty-seven trillion, seven hundred seventy-five billion, six hundred fifty-five million, one hundred eighty thousand, five hundred eighty-one".