1555156661164 has 24 divisors (see below), whose sum is σ = 2744546012208. Its totient is φ = 771028354560.

The previous prime is 1555156661159. The next prime is 1555156661173. The reversal of 1555156661164 is 4611666515551.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3237262 + ... + 3686485.

It is an arithmetic number, because the mean of its divisors is an integer number (114356083842).

Almost surely, 2^{1555156661164} is an apocalyptic number.

It is an amenable number.

1555156661164 is a deficient number, since it is larger than the sum of its proper divisors (1189389351044).

1555156661164 is a wasteful number, since it uses less digits than its factorization.

1555156661164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6924225 (or 6924223 counting only the distinct ones).

The product of its digits is 3240000, while the sum is 52.

The spelling of 1555156661164 in words is "one trillion, five hundred fifty-five billion, one hundred fifty-six million, six hundred sixty-one thousand, one hundred sixty-four".