1012565655 has 24 divisors (see below), whose sum is σ = 1767751440. Its totient is φ = 536146560.

The previous prime is 1012565647. The next prime is 1012565663. The reversal of 1012565655 is 5565652101.

It is an interprime number because it is at equal distance from previous prime (1012565647) and next prime (1012565663).

It is not a de Polignac number, because 1012565655 - 2³ = 1012565647 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74686 + ... + 87195.

It is an arithmetic number, because the mean of its divisors is an integer number (73656310).

Almost surely, 2^1012565655 is an apocalyptic number.

1012565655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1012565655 is a deficient number, since it is larger than the sum of its proper divisors (755185785).

1012565655 is a wasteful number, since it uses less digits than its factorization.

1012565655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162031 (or 162028 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The square root of 1012565655 is about 31820.8368054644. The cubic root of 1012565655 is about 1004.1711291580.

The spelling of 1012565655 in words is "one billion, twelve million, five hundred sixty-five thousand, six hundred fifty-five".