155505636766 has 32 divisors (see below), whose sum is σ = 258853397760. Its totient is φ = 69688983936.

The previous prime is 155505636709. The next prime is 155505636779. The reversal of 155505636766 is 667636505551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260496 + ... + 615523.

It is an arithmetic number, because the mean of its divisors is an integer number (8089168680).

Almost surely, 2^155505636766 is an apocalyptic number.

155505636766 is a deficient number, since it is larger than the sum of its proper divisors (103347760994).

155505636766 is a wasteful number, since it uses less digits than its factorization.

155505636766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876288.

The product of its (nonzero) digits is 17010000, while the sum is 55.

The spelling of 155505636766 in words is "one hundred fifty-five billion, five hundred five million, six hundred thirty-six thousand, seven hundred sixty-six".