2577121428 has 48 divisors (see below), whose sum is σ = 6886208000. Its totient is φ = 734832864.

The previous prime is 2577121423. The next prime is 2577121493. The reversal of 2577121428 is 8241217752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2577121423) 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, 11175 + ... + 72657.

Almost surely, 2^2577121428 is an apocalyptic number.

2577121428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2577121428 is an abundant number, since it is smaller than the sum of its proper divisors (4309086572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2577121428 is a wasteful number, since it uses less digits than its factorization.

2577121428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61996 (or 61994 counting only the distinct ones).

The product of its digits is 62720, while the sum is 39.

The square root of 2577121428 is about 50765.3565731592. The cubic root of 2577121428 is about 1371.0236950727.

The spelling of 2577121428 in words is "two billion, five hundred seventy-seven million, one hundred twenty-one thousand, four hundred twenty-eight".