155453425121 has 2 divisors, whose sum is σ = 155453425122. Its totient is φ = 155453425120.

The previous prime is 155453425109. The next prime is 155453425147. The reversal of 155453425121 is 121524354551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128404688896 + 27048736225 = 358336^2 + 164465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155453425121 is a prime.

It is not a weakly prime, because it can be changed into another prime (155453425181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77726712560 + 77726712561.

It is an arithmetic number, because the mean of its divisors is an integer number (77726712561).

Almost surely, 2^155453425121 is an apocalyptic number.

It is an amenable number.

155453425121 is a deficient number, since it is larger than the sum of its proper divisors (1).

155453425121 is an equidigital number, since it uses as much as digits as its factorization.

155453425121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120000, while the sum is 38.

Adding to 155453425121 its reverse (121524354551), we get a palindrome (276977779672).

The spelling of 155453425121 in words is "one hundred fifty-five billion, four hundred fifty-three million, four hundred twenty-five thousand, one hundred twenty-one".