1157661222272 has 32 divisors (see below), whose sum is σ = 2330054305320. Its totient is φ = 572863279104.

The previous prime is 1157661222259. The next prime is 1157661222287. The reversal of 1157661222272 is 2722221667511.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-3 number, since 3×1157661222272³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

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, 46607318 + ... + 46632149.

Almost surely, 2^{1157661222272} is an apocalyptic number.

It is an amenable number.

1157661222272 is an abundant number, since it is smaller than the sum of its proper divisors (1172393083048).

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

1157661222272 is an frugal number, since it uses more digits than its factorization.

1157661222272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93239578 (or 93239566 counting only the distinct ones).

The product of its digits is 282240, while the sum is 44.

Adding to 1157661222272 its reverse (2722221667511), we get a palindrome (3879882889783).

The spelling of 1157661222272 in words is "one trillion, one hundred fifty-seven billion, six hundred sixty-one million, two hundred twenty-two thousand, two hundred seventy-two".