1131735623220 has 72 divisors (see below), whose sum is σ = 3437577168480. Its totient is φ = 301387746240.

The previous prime is 1131735623201. The next prime is 1131735623233. The reversal of 1131735623220 is 223265371311.

1131735623220 is a `hidden beast` number, since 1 + 1 + 3 + 1 + 7 + 3 + 5 + 623 + 2 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4120986 + ... + 4387025.

It is an arithmetic number, because the mean of its divisors is an integer number (47744127340).

Almost surely, 2^{1131735623220} is an apocalyptic number.

1131735623220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131735623220 is an abundant number, since it is smaller than the sum of its proper divisors (2305841545260).

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

1131735623220 is a wasteful number, since it uses less digits than its factorization.

1131735623220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8508765 (or 8508760 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The spelling of 1131735623220 in words is "one trillion, one hundred thirty-one billion, seven hundred thirty-five million, six hundred twenty-three thousand, two hundred twenty".