2638857001 has 12 divisors (see below), whose sum is σ = 2981453904. Its totient is φ = 2316230000.

The previous prime is 2638856959. The next prime is 2638857017. The reversal of 2638857001 is 1007588362.

It is not a de Polignac number, because 2638857001 - 2¹⁹ = 2638332713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2638857301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133375 + ... + 151876.

It is an arithmetic number, because the mean of its divisors is an integer number (248454492).

Almost surely, 2^2638857001 is an apocalyptic number.

It is an amenable number.

2638857001 is a deficient number, since it is larger than the sum of its proper divisors (342596903).

2638857001 is a wasteful number, since it uses less digits than its factorization.

2638857001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285320 (or 285291 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 2638857001 is about 51369.8063165514. The cubic root of 2638857001 is about 1381.8851574409.

The spelling of 2638857001 in words is "two billion, six hundred thirty-eight million, eight hundred fifty-seven thousand, one".