2545421757 has 16 divisors (see below), whose sum is σ = 3424561152. Its totient is φ = 1681646400.

The previous prime is 2545421741. The next prime is 2545421761. The reversal of 2545421757 is 7571245452.

It is not a de Polignac number, because 2545421757 - 2⁴ = 2545421741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2545421057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 376507 + ... + 383207.

It is an arithmetic number, because the mean of its divisors is an integer number (214035072).

Almost surely, 2^2545421757 is an apocalyptic number.

It is an amenable number.

2545421757 is a deficient number, since it is larger than the sum of its proper divisors (879139395).

2545421757 is a wasteful number, since it uses less digits than its factorization.

2545421757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7828.

The product of its digits is 392000, while the sum is 42.

The square root of 2545421757 is about 50452.1729660874. The cubic root of 2545421757 is about 1365.3790995767.

The spelling of 2545421757 in words is "two billion, five hundred forty-five million, four hundred twenty-one thousand, seven hundred fifty-seven".