155425590091 has 8 divisors (see below), whose sum is σ = 159533013024. Its totient is φ = 151333241280.

The previous prime is 155425590083. The next prime is 155425590121. The reversal of 155425590091 is 190095524551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155425590091 - 2³ = 155425590083 is a prime.

It is a super-2 number, since 2×155425590091² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155425590011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3747636 + ... + 3788881.

It is an arithmetic number, because the mean of its divisors is an integer number (19941626628).

Almost surely, 2^155425590091 is an apocalyptic number.

155425590091 is a deficient number, since it is larger than the sum of its proper divisors (4107422933).

155425590091 is an equidigital number, since it uses as much as digits as its factorization.

155425590091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7537061.

The product of its (nonzero) digits is 405000, while the sum is 46.

The spelling of 155425590091 in words is "one hundred fifty-five billion, four hundred twenty-five million, five hundred ninety thousand, ninety-one".