155566655505 has 48 divisors (see below), whose sum is σ = 273571758720. Its totient is φ = 81762912000.

The previous prime is 155566655483. The next prime is 155566655533. The reversal of 155566655505 is 505556665551.

It is not a de Polignac number, because 155566655505 - 2⁸ = 155566655249 is a prime.

It is a super-2 number, since 2×155566655505² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7846605 + ... + 7866405.

It is an arithmetic number, because the mean of its divisors is an integer number (5699411640).

Almost surely, 2^155566655505 is an apocalyptic number.

155566655505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155566655505 is a deficient number, since it is larger than the sum of its proper divisors (118005103215).

155566655505 is a wasteful number, since it uses less digits than its factorization.

155566655505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22342 (or 22339 counting only the distinct ones).

The product of its (nonzero) digits is 16875000, while the sum is 54.

The spelling of 155566655505 in words is "one hundred fifty-five billion, five hundred sixty-six million, six hundred fifty-five thousand, five hundred five".