1151131555020 has 48 divisors (see below), whose sum is σ = 3225456148320. Its totient is φ = 306750529536.

The previous prime is 1151131554983. The next prime is 1151131555027. The reversal of 1151131555020 is 205551311511.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1151131555027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6723667 + ... + 6892746.

It is an arithmetic number, because the mean of its divisors is an integer number (67197003090).

Almost surely, 2^{1151131555020} is an apocalyptic number.

1151131555020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1151131555020 is an abundant number, since it is smaller than the sum of its proper divisors (2074324593300).

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

1151131555020 is a wasteful number, since it uses less digits than its factorization.

1151131555020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13617834 (or 13617832 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 30.

Adding to 1151131555020 its reverse (205551311511), we get a palindrome (1356682866531).

The spelling of 1151131555020 in words is "one trillion, one hundred fifty-one billion, one hundred thirty-one million, five hundred fifty-five thousand, twenty".