155151561605 has 8 divisors (see below), whose sum is σ = 186199006200. Its totient is φ = 124109827776.

The previous prime is 155151561601. The next prime is 155151561619. The reversal of 155151561605 is 506165151551.

It can be written as a sum of positive squares in 4 ways, for example, as 2519136481 + 152632425124 = 50191^2 + 390682^2 .

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 155151561605 - 2² = 155151561601 is a prime.

It is a super-2 number, since 2×155151561605² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155151561601) 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, 1367690 + ... + 1476779.

It is an arithmetic number, because the mean of its divisors is an integer number (23274875775).

Almost surely, 2^155151561605 is an apocalyptic number.

It is an amenable number.

155151561605 is a deficient number, since it is larger than the sum of its proper divisors (31047444595).

155151561605 is a wasteful number, since it uses less digits than its factorization.

155151561605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2855383.

The product of its (nonzero) digits is 112500, while the sum is 41.

The spelling of 155151561605 in words is "one hundred fifty-five billion, one hundred fifty-one million, five hundred sixty-one thousand, six hundred five".