2581994442237 has 8 divisors (see below), whose sum is σ = 3934467721536. Its totient is φ = 1475425395552.

The previous prime is 2581994442233. The next prime is 2581994442283. The reversal of 2581994442237 is 7322444991852.

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

It is not a de Polignac number, because 2581994442237 - 2² = 2581994442233 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581994442233) 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, 61476058128 + ... + 61476058169.

It is an arithmetic number, because the mean of its divisors is an integer number (491808465192).

Almost surely, 2^{2581994442237} is an apocalyptic number.

It is an amenable number.

2581994442237 is a deficient number, since it is larger than the sum of its proper divisors (1352473279299).

2581994442237 is a wasteful number, since it uses less digits than its factorization.

2581994442237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122952116307.

The product of its digits is 34836480, while the sum is 60.

The spelling of 2581994442237 in words is "two trillion, five hundred eighty-one billion, nine hundred ninety-four million, four hundred forty-two thousand, two hundred thirty-seven".