155156553099 has 12 divisors (see below), whose sum is σ = 224118989016. Its totient is φ = 103435870752.

The previous prime is 155156553091. The next prime is 155156553107. The reversal of 155156553099 is 990355651551.

155156553099 is a `hidden beast` number, since 1 + 5 + 5 + 15 + 6 + 5 + 530 + 99 = 666.

It is an interprime number because it is at equal distance from previous prime (155156553091) and next prime (155156553107).

It is not a de Polignac number, because 155156553099 - 2³ = 155156553091 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (155156553091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 558247 + ... + 788639.

It is an arithmetic number, because the mean of its divisors is an integer number (18676582418).

Almost surely, 2^155156553099 is an apocalyptic number.

155156553099 is a deficient number, since it is larger than the sum of its proper divisors (68962435917).

155156553099 is a wasteful number, since it uses less digits than its factorization.

155156553099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305226 (or 305223 counting only the distinct ones).

The product of its (nonzero) digits is 4556250, while the sum is 54.

The spelling of 155156553099 in words is "one hundred fifty-five billion, one hundred fifty-six million, five hundred fifty-three thousand, ninety-nine".