1253164661 has 12 divisors (see below), whose sum is σ = 1482474240. Its totient is φ = 1055932920.

The previous prime is 1253164657. The next prime is 1253164669. The reversal of 1253164661 is 1664613521.

It is not a de Polignac number, because 1253164661 - 2² = 1253164657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253164669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213845 + ... + 219626.

It is an arithmetic number, because the mean of its divisors is an integer number (123539520).

Almost surely, 2^1253164661 is an apocalyptic number.

It is an amenable number.

1253164661 is a deficient number, since it is larger than the sum of its proper divisors (229309579).

1253164661 is an equidigital number, since it uses as much as digits as its factorization.

1253164661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433544 (or 433537 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 1253164661 is about 35400.0658332721. The cubic root of 1253164661 is about 1078.1256529756.

The spelling of 1253164661 in words is "one billion, two hundred fifty-three million, one hundred sixty-four thousand, six hundred sixty-one".