1150501121550 has 120 divisors (see below), whose sum is σ = 3487296867912. Its totient is φ = 278909352000.

The previous prime is 1150501121509. The next prime is 1150501121569. The reversal of 1150501121550 is 551211050511.

It is a happy number.

1150501121550 is a `hidden beast` number, since 1 + 1 + 5 + 0 + 501 + 1 + 2 + 155 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 12867921 + ... + 12957020.

Almost surely, 2^{1150501121550} is an apocalyptic number.

1150501121550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1150501121550 is an abundant number, since it is smaller than the sum of its proper divisors (2336795746362).

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

1150501121550 is a wasteful number, since it uses less digits than its factorization.

1150501121550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25824976 (or 25824962 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 27.

The spelling of 1150501121550 in words is "one trillion, one hundred fifty billion, five hundred one million, one hundred twenty-one thousand, five hundred fifty".