155311745261 has 16 divisors (see below), whose sum is σ = 158977324800. Its totient is φ = 151690226688.

The previous prime is 155311745257. The next prime is 155311745287. The reversal of 155311745261 is 162547113551.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 155311745261 - 2² = 155311745257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155311745761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21782345 + ... + 21789473.

It is an arithmetic number, because the mean of its divisors is an integer number (9936082800).

Almost surely, 2^155311745261 is an apocalyptic number.

It is an amenable number.

155311745261 is a deficient number, since it is larger than the sum of its proper divisors (3665579539).

155311745261 is an equidigital number, since it uses as much as digits as its factorization.

155311745261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10148.

The product of its digits is 126000, while the sum is 41.

The spelling of 155311745261 in words is "one hundred fifty-five billion, three hundred eleven million, seven hundred forty-five thousand, two hundred sixty-one".