155711666157261 has 8 divisors (see below), whose sum is σ = 209555887165344. Its totient is φ = 102837611293680.

The previous prime is 155711666157217. The next prime is 155711666157373. The reversal of 155711666157261 is 162751666117551.

It is a happy number.

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

It is not a de Polignac number, because 155711666157261 - 2²⁷ = 155711531939533 is a prime.

It is a super-2 number, since 2×155711666157261² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155711666157195 and 155711666157204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155711666557261) 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, 242541535750 + ... + 242541536391.

It is an arithmetic number, because the mean of its divisors is an integer number (26194485895668).

Almost surely, 2^{155711666157261} is an apocalyptic number.

It is an amenable number.

155711666157261 is a deficient number, since it is larger than the sum of its proper divisors (53844221008083).

155711666157261 is a wasteful number, since it uses less digits than its factorization.

155711666157261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485083072251.

The product of its digits is 15876000, while the sum is 60.

The spelling of 155711666157261 in words is "one hundred fifty-five trillion, seven hundred eleven billion, six hundred sixty-six million, one hundred fifty-seven thousand, two hundred sixty-one".