155972298481 has 2 divisors, whose sum is σ = 155972298482. Its totient is φ = 155972298480.

The previous prime is 155972298473. The next prime is 155972298487. The reversal of 155972298481 is 184892279551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110862361600 + 45109936881 = 332960^2 + 212391^2 .

It is a cyclic number.

It is not a de Polignac number, because 155972298481 - 2³ = 155972298473 is a prime.

It is a super-2 number, since 2×155972298481² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155972298487) 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 as a sum of consecutive naturals, namely, 77986149240 + 77986149241.

It is an arithmetic number, because the mean of its divisors is an integer number (77986149241).

Almost surely, 2^155972298481 is an apocalyptic number.

It is an amenable number.

155972298481 is a deficient number, since it is larger than the sum of its proper divisors (1).

155972298481 is an equidigital number, since it uses as much as digits as its factorization.

155972298481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14515200, while the sum is 61.

The spelling of 155972298481 in words is "one hundred fifty-five billion, nine hundred seventy-two million, two hundred ninety-eight thousand, four hundred eighty-one".