5425857661 has 8 divisors (see below), whose sum is σ = 6327531200. Its totient is φ = 4650734844.

The previous prime is 5425857653. The next prime is 5425857667. The reversal of 5425857661 is 1667585245.

It is not a de Polignac number, because 5425857661 - 2³ = 5425857653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5425857667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7909071 + ... + 7909756.

It is an arithmetic number, because the mean of its divisors is an integer number (790941400).

Almost surely, 2^5425857661 is an apocalyptic number.

It is an amenable number.

5425857661 is a deficient number, since it is larger than the sum of its proper divisors (901673539).

5425857661 is an equidigital number, since it uses as much as digits as its factorization.

5425857661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15818848 (or 15818834 counting only the distinct ones).

The product of its digits is 2016000, while the sum is 49.

The square root of 5425857661 is about 73660.4212654258. The cubic root of 5425857661 is about 1757.2064909717.

The spelling of 5425857661 in words is "five billion, four hundred twenty-five million, eight hundred fifty-seven thousand, six hundred sixty-one".