1655065597 has 4 divisors (see below), whose sum is σ = 1655174620. Its totient is φ = 1654956576.

The previous prime is 1655065591. The next prime is 1655065613. The reversal of 1655065597 is 7955605561.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7955605561 = 32971 ⋅241291.

It can be written as a sum of positive squares in 2 ways, for example, as 923308996 + 731756601 = 30386^2 + 27051^2 .

It is a cyclic number.

It is not a de Polignac number, because 1655065597 - 2³ = 1655065589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1655065597.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655065591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27168 + ... + 63625.

It is an arithmetic number, because the mean of its divisors is an integer number (413793655).

Almost surely, 2^1655065597 is an apocalyptic number.

It is an amenable number.

1655065597 is a deficient number, since it is larger than the sum of its proper divisors (109023).

1655065597 is an equidigital number, since it uses as much as digits as its factorization.

1655065597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109022.

The product of its (nonzero) digits is 1417500, while the sum is 49.

The square root of 1655065597 is about 40682.4974282553. The cubic root of 1655065597 is about 1182.8737761801.

The spelling of 1655065597 in words is "one billion, six hundred fifty-five million, sixty-five thousand, five hundred ninety-seven".