1157799636 has 72 divisors (see below), whose sum is σ = 3491792640. Its totient is φ = 330798384.

The previous prime is 1157799631. The next prime is 1157799641. The reversal of 1157799636 is 6369977511.

It is a happy number.

1157799636 is a `hidden beast` number, since 1 + 1 + 577 + 9 + 9 + 63 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (1157799631) and next prime (1157799641).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157799631) 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 23 ways as a sum of consecutive naturals, for example, 104100 + ... + 114683.

It is an arithmetic number, because the mean of its divisors is an integer number (48497120).

Almost surely, 2^1157799636 is an apocalyptic number.

It is an amenable number.

1157799636 is an abundant number, since it is smaller than the sum of its proper divisors (2333993004).

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

1157799636 is a wasteful number, since it uses less digits than its factorization.

1157799636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218810 (or 218795 counting only the distinct ones).

The product of its digits is 2143260, while the sum is 54.

The square root of 1157799636 is about 34026.4549431762. The cubic root of 1157799636 is about 1050.0527973451.

The spelling of 1157799636 in words is "one billion, one hundred fifty-seven million, seven hundred ninety-nine thousand, six hundred thirty-six".