1151615720 has 32 divisors (see below), whose sum is σ = 2592275400. Its totient is φ = 460443648.

The previous prime is 1151615711. The next prime is 1151615737. The reversal of 1151615720 is 275161511.

It can be written as a sum of positive squares in 4 ways, for example, as 305620324 + 845995396 = 17482^2 + 29086^2 .

It is a super-2 number, since 2×1151615720² = 2652437533102236800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113912 + ... + 123608.

Almost surely, 2^1151615720 is an apocalyptic number.

1151615720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1151615720 is an abundant number, since it is smaller than the sum of its proper divisors (1440659680).

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

1151615720 is a wasteful number, since it uses less digits than its factorization.

1151615720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12677 (or 12673 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 29.

The square root of 1151615720 is about 33935.4640457442. The cubic root of 1151615720 is about 1048.1799823936.

The spelling of 1151615720 in words is "one billion, one hundred fifty-one million, six hundred fifteen thousand, seven hundred twenty".