1065615620 has 12 divisors (see below), whose sum is σ = 2237792844. Its totient is φ = 426246240.

The previous prime is 1065615613. The next prime is 1065615647. The reversal of 1065615620 is 265165601.

It can be written as a sum of positive squares in 2 ways, for example, as 461734144 + 603881476 = 21488^2 + 24574^2 .

It is a super-2 number, since 2×1065615620² = 2271073299175968800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26640371 + ... + 26640410.

It is an arithmetic number, because the mean of its divisors is an integer number (186482737).

Almost surely, 2^1065615620 is an apocalyptic number.

1065615620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1065615620 is an abundant number, since it is smaller than the sum of its proper divisors (1172177224).

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

1065615620 is a wasteful number, since it uses less digits than its factorization.

1065615620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53280790 (or 53280788 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 1065615620 is about 32643.7684711799. The cubic root of 1065615620 is about 1021.4102049982.

The spelling of 1065615620 in words is "one billion, sixty-five million, six hundred fifteen thousand, six hundred twenty".