155650661551556 has 48 divisors (see below), whose sum is σ = 276385366964784. Its totient is φ = 76685475741696.

The previous prime is 155650661551531. The next prime is 155650661551571. The reversal of 155650661551556 is 655155166056551.

It can be written as a sum of positive squares in 8 ways, for example, as 3109635989056 + 152541025562500 = 1763416^2 + 12350750^2 .

It is a super-2 number, since 2×155650661551556² (a number of 29 digits) contains 22 as substring.

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, 6449690066 + ... + 6449714198.

It is an arithmetic number, because the mean of its divisors is an integer number (5758028478433).

Almost surely, 2^{155650661551556} is an apocalyptic number.

It is an amenable number.

155650661551556 is a deficient number, since it is larger than the sum of its proper divisors (120734705413228).

155650661551556 is a wasteful number, since it uses less digits than its factorization.

155650661551556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44520 (or 44518 counting only the distinct ones).

The product of its (nonzero) digits is 101250000, while the sum is 62.

The spelling of 155650661551556 in words is "one hundred fifty-five trillion, six hundred fifty billion, six hundred sixty-one million, five hundred fifty-one thousand, five hundred fifty-six".