1151615551 has 8 divisors (see below), whose sum is σ = 1181751120. Its totient is φ = 1121632512.

The previous prime is 1151615533. The next prime is 1151615603. The reversal of 1151615551 is 1555161511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1151615551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151615051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22756 + ... + 53113.

It is an arithmetic number, because the mean of its divisors is an integer number (147718890).

Almost surely, 2^1151615551 is an apocalyptic number.

1151615551 is a deficient number, since it is larger than the sum of its proper divisors (30135569).

1151615551 is an equidigital number, since it uses as much as digits as its factorization.

1151615551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76265.

The product of its digits is 3750, while the sum is 31.

The square root of 1151615551 is about 33935.4615557237. The cubic root of 1151615551 is about 1048.1799311200.

The spelling of 1151615551 in words is "one billion, one hundred fifty-one million, six hundred fifteen thousand, five hundred fifty-one".