1162157765 has 8 divisors (see below), whose sum is σ = 1420902648. Its totient is φ = 912184000.

The previous prime is 1162157747. The next prime is 1162157771. The reversal of 1162157765 is 5677512611.

It can be written as a sum of positive squares in 4 ways, for example, as 4661281 + 1157496484 = 2159^2 + 34022^2 .

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

It is not a de Polignac number, because 1162157765 - 2⁶ = 1162157701 is a prime.

It is a super-2 number, since 2×1162157765² = 2701221341499590450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2192486 + ... + 2193015.

It is an arithmetic number, because the mean of its divisors is an integer number (177612831).

Almost surely, 2^1162157765 is an apocalyptic number.

It is an amenable number.

1162157765 is a deficient number, since it is larger than the sum of its proper divisors (258744883).

1162157765 is an equidigital number, since it uses as much as digits as its factorization.

1162157765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4385559.

The product of its digits is 88200, while the sum is 41.

The square root of 1162157765 is about 34090.4350954927. The cubic root of 1162157765 is about 1051.3686656726.

The spelling of 1162157765 in words is "one billion, one hundred sixty-two million, one hundred fifty-seven thousand, seven hundred sixty-five".