1157720216 has 8 divisors (see below), whose sum is σ = 2170725420. Its totient is φ = 578860104.

The previous prime is 1157720191. The next prime is 1157720231. The reversal of 1157720216 is 6120277511.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72357506 + ... + 72357521.

Almost surely, 2^1157720216 is an apocalyptic number.

It is an amenable number.

1157720216 is a deficient number, since it is larger than the sum of its proper divisors (1013005204).

1157720216 is a wasteful number, since it uses less digits than its factorization.

1157720216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144715033 (or 144715029 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 1157720216 is about 34025.2878900385. The cubic root of 1157720216 is about 1050.0287871170.

Adding to 1157720216 its reverse (6120277511), we get a palindrome (7277997727).

The spelling of 1157720216 in words is "one billion, one hundred fifty-seven million, seven hundred twenty thousand, two hundred sixteen".