1156620465 has 224 divisors, whose sum is σ = 2802836736. Its totient is φ = 442298880.

The previous prime is 1156620461. The next prime is 1156620467. The reversal of 1156620465 is 5640266511.

1156620465 is a `hidden beast` number, since 11 + 566 + 20 + 4 + 65 = 666.

It is not a de Polignac number, because 1156620465 - 2² = 1156620461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1156620461) by changing a digit.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 3648487 + ... + 3648803.

It is an arithmetic number, because the mean of its divisors is an integer number (12512664).

Almost surely, 2^1156620465 is an apocalyptic number.

1156620465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1156620465 is an abundant number, since it is smaller than the sum of its proper divisors (1646216271).

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

1156620465 is a wasteful number, since it uses less digits than its factorization.

1156620465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 356 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 1156620465 is about 34009.1232612662. The cubic root of 1156620465 is about 1049.6961978220.

Adding to 1156620465 its reverse (5640266511), we get a palindrome (6796886976).

The spelling of 1156620465 in words is "one billion, one hundred fifty-six million, six hundred twenty thousand, four hundred sixty-five".