1550550156 has 12 divisors (see below), whose sum is σ = 3617950392. Its totient is φ = 516850048.

The previous prime is 1550550121. The next prime is 1550550167. The reversal of 1550550156 is 6510550551.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64606245 + ... + 64606268.

It is an arithmetic number, because the mean of its divisors is an integer number (301495866).

Almost surely, 2^1550550156 is an apocalyptic number.

It is an amenable number.

1550550156 is an abundant number, since it is smaller than the sum of its proper divisors (2067400236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1550550156 is a wasteful number, since it uses less digits than its factorization.

1550550156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129212520 (or 129212518 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 33.

The square root of 1550550156 is about 39377.0257383668. The cubic root of 1550550156 is about 1157.4314341906.

The spelling of 1550550156 in words is "one billion, five hundred fifty million, five hundred fifty thousand, one hundred fifty-six".