155241611551 has 32 divisors (see below), whose sum is σ = 189029030400. Its totient is φ = 126019031040.

The previous prime is 155241611519. The next prime is 155241611557. The reversal of 155241611551 is 155116142551.

It is a cyclic number.

It is not a de Polignac number, because 155241611551 - 2⁵ = 155241611519 is a prime.

It is a super-4 number, since 4×155241611551⁴ (a number of 46 digits) contains 4444 as substring.

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 155241611551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155241611557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 192006 + ... + 589363.

It is an arithmetic number, because the mean of its divisors is an integer number (5907157200).

Almost surely, 2^155241611551 is an apocalyptic number.

155241611551 is a deficient number, since it is larger than the sum of its proper divisors (33787418849).

155241611551 is a wasteful number, since it uses less digits than its factorization.

155241611551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781459.

The product of its digits is 30000, while the sum is 37.

The spelling of 155241611551 in words is "one hundred fifty-five billion, two hundred forty-one million, six hundred eleven thousand, five hundred fifty-one".