2557001004 has 12 divisors (see below), whose sum is σ = 5966335704. Its totient is φ = 852333664.

The previous prime is 2557000997. The next prime is 2557001009. The reversal of 2557001004 is 4001007552.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (2557001009) 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, 106541697 + ... + 106541720.

It is an arithmetic number, because the mean of its divisors is an integer number (497194642).

Almost surely, 2^2557001004 is an apocalyptic number.

It is an amenable number.

2557001004 is an abundant number, since it is smaller than the sum of its proper divisors (3409334700).

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

2557001004 is a wasteful number, since it uses less digits than its factorization.

2557001004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213083424 (or 213083422 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 2557001004 is about 50566.7974465459. The cubic root of 2557001004 is about 1367.4463599595.

Adding to 2557001004 its reverse (4001007552), we get a palindrome (6558008556).

The spelling of 2557001004 in words is "two billion, five hundred fifty-seven million, one thousand, four".