155090589697 has 4 divisors (see below), whose sum is σ = 155091490096. Its totient is φ = 155089689300.

The previous prime is 155090589679. The next prime is 155090589727. The reversal of 155090589697 is 796985090551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 796985090551 = 13 ⋅61306545427.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155090589697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155090589197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102123 + ... + 566224.

It is an arithmetic number, because the mean of its divisors is an integer number (38772872524).

Almost surely, 2^155090589697 is an apocalyptic number.

It is an amenable number.

155090589697 is a deficient number, since it is larger than the sum of its proper divisors (900399).

155090589697 is an equidigital number, since it uses as much as digits as its factorization.

155090589697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900398.

The product of its (nonzero) digits is 30618000, while the sum is 64.

The spelling of 155090589697 in words is "one hundred fifty-five billion, ninety million, five hundred eighty-nine thousand, six hundred ninety-seven".