155372451197 has 2 divisors, whose sum is σ = 155372451198. Its totient is φ = 155372451196.

The previous prime is 155372451161. The next prime is 155372451209. The reversal of 155372451197 is 791154273551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139602365956 + 15770085241 = 373634^2 + 125579^2 .

It is an emirp because it is prime and its reverse (791154273551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155372451197 - 2³⁶ = 86652974461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155372451397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77686225598 + 77686225599.

It is an arithmetic number, because the mean of its divisors is an integer number (77686225599).

Almost surely, 2^155372451197 is an apocalyptic number.

It is an amenable number.

155372451197 is a deficient number, since it is larger than the sum of its proper divisors (1).

155372451197 is an equidigital number, since it uses as much as digits as its factorization.

155372451197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1323000, while the sum is 50.

The spelling of 155372451197 in words is "one hundred fifty-five billion, three hundred seventy-two million, four hundred fifty-one thousand, one hundred ninety-seven".