2605697901 has 24 divisors (see below), whose sum is σ = 3906739200. Its totient is φ = 1671775200.

The previous prime is 2605697893. The next prime is 2605697903. The reversal of 2605697901 is 1097965062.

It is a happy number.

It is not a de Polignac number, because 2605697901 - 2³ = 2605697893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2605697903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24700 + ... + 76298.

It is an arithmetic number, because the mean of its divisors is an integer number (162780800).

Almost surely, 2^2605697901 is an apocalyptic number.

It is an amenable number.

2605697901 is a deficient number, since it is larger than the sum of its proper divisors (1301041299).

2605697901 is a wasteful number, since it uses less digits than its factorization.

2605697901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51817 (or 51814 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 2605697901 is about 51046.0370743900. The cubic root of 2605697901 is about 1376.0726221713.

The spelling of 2605697901 in words is "two billion, six hundred five million, six hundred ninety-seven thousand, nine hundred one".