1157261318172 has 36 divisors (see below), whose sum is σ = 2925332384520. Its totient is φ = 385749428832.

The previous prime is 1157261318149. The next prime is 1157261318197. The reversal of 1157261318172 is 2718131627511.

1157261318172 is a `hidden beast` number, since 1 + 1 + 5 + 7 + 2 + 613 + 18 + 17 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5521363 + ... + 5727125.

Almost surely, 2^{1157261318172} is an apocalyptic number.

1157261318172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1157261318172 is an abundant number, since it is smaller than the sum of its proper divisors (1768071066348).

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

1157261318172 is a wasteful number, since it uses less digits than its factorization.

1157261318172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362002 (or 361997 counting only the distinct ones).

The product of its digits is 141120, while the sum is 45.

The spelling of 1157261318172 in words is "one trillion, one hundred fifty-seven billion, two hundred sixty-one million, three hundred eighteen thousand, one hundred seventy-two".