155661534054311 has 4 divisors (see below), whose sum is σ = 155661656489472. Its totient is φ = 155661411619152.

The previous prime is 155661534054269. The next prime is 155661534054317. The reversal of 155661534054311 is 113450435166551.

It is a happy number.

155661534054311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155661534054311 - 2³⁴ = 155644354185127 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155661534054311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155661534054317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59290286 + ... + 61860011.

It is an arithmetic number, because the mean of its divisors is an integer number (38915414122368).

Almost surely, 2^{155661534054311} is an apocalyptic number.

155661534054311 is a deficient number, since it is larger than the sum of its proper divisors (122435161).

155661534054311 is a wasteful number, since it uses less digits than its factorization.

155661534054311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122435160.

The product of its (nonzero) digits is 3240000, while the sum is 50.

The spelling of 155661534054311 in words is "one hundred fifty-five trillion, six hundred sixty-one billion, five hundred thirty-four million, fifty-four thousand, three hundred eleven".