155442414997 has 2 divisors, whose sum is σ = 155442414998. Its totient is φ = 155442414996.

The previous prime is 155442414989. The next prime is 155442415027. The reversal of 155442414997 is 799414244551.

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., 85360971556 + 70081443441 = 292166^2 + 264729^2 .

It is a cyclic number.

It is not a de Polignac number, because 155442414997 - 2³ = 155442414989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155442414947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77721207498 + 77721207499.

It is an arithmetic number, because the mean of its divisors is an integer number (77721207499).

Almost surely, 2^155442414997 is an apocalyptic number.

It is an amenable number.

155442414997 is a deficient number, since it is larger than the sum of its proper divisors (1).

155442414997 is an equidigital number, since it uses as much as digits as its factorization.

155442414997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7257600, while the sum is 55.

The spelling of 155442414997 in words is "one hundred fifty-five billion, four hundred forty-two million, four hundred fourteen thousand, nine hundred ninety-seven".