2545401653 has 4 divisors (see below), whose sum is σ = 2695131180. Its totient is φ = 2395672128.

The previous prime is 2545401629. The next prime is 2545401667. The reversal of 2545401653 is 3561045452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1622639524 + 922762129 = 40282^2 + 30377^2 .

It is a cyclic number.

It is not a de Polignac number, because 2545401653 - 2⁶ = 2545401589 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 (2545401673) 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, 74864738 + ... + 74864771.

It is an arithmetic number, because the mean of its divisors is an integer number (673782795).

Almost surely, 2^2545401653 is an apocalyptic number.

It is an amenable number.

2545401653 is a deficient number, since it is larger than the sum of its proper divisors (149729527).

2545401653 is a wasteful number, since it uses less digits than its factorization.

2545401653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149729526.

The product of its (nonzero) digits is 72000, while the sum is 35.

The square root of 2545401653 is about 50451.9737274965. The cubic root of 2545401653 is about 1365.3755049329.

The spelling of 2545401653 in words is "two billion, five hundred forty-five million, four hundred one thousand, six hundred fifty-three".