2557541061921 has 8 divisors (see below), whose sum is σ = 3410103143680. Its totient is φ = 1705003177392.

The previous prime is 2557541061919. The next prime is 2557541061953. The reversal of 2557541061921 is 1291601457552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2557541061921 - 2¹ = 2557541061919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2557541061961) 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, 5801230 + ... + 6226503.

It is an arithmetic number, because the mean of its divisors is an integer number (426262892960).

Almost surely, 2^{2557541061921} is an apocalyptic number.

It is an amenable number.

2557541061921 is a deficient number, since it is larger than the sum of its proper divisors (852562081759).

2557541061921 is a wasteful number, since it uses less digits than its factorization.

2557541061921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12098615.

The product of its (nonzero) digits is 756000, while the sum is 48.

The spelling of 2557541061921 in words is "two trillion, five hundred fifty-seven billion, five hundred forty-one million, sixty-one thousand, nine hundred twenty-one".