2542643851 has 8 divisors (see below), whose sum is σ = 2792164608. Its totient is φ = 2296185000.

The previous prime is 2542643843. The next prime is 2542643863. The reversal of 2542643851 is 1583462452.

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

It is a cyclic number.

It is not a de Polignac number, because 2542643851 - 2³ = 2542643843 is a prime.

It is a super-2 number, since 2×2542643851² = 12930075506056220402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2542643891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 763735 + ... + 767056.

It is an arithmetic number, because the mean of its divisors is an integer number (349020576).

Almost surely, 2^2542643851 is an apocalyptic number.

2542643851 is a deficient number, since it is larger than the sum of its proper divisors (249520757).

2542643851 is a wasteful number, since it uses less digits than its factorization.

2542643851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530953.

The product of its digits is 230400, while the sum is 40.

The square root of 2542643851 is about 50424.6353581263. The cubic root of 2542643851 is about 1364.8822237785.

The spelling of 2542643851 in words is "two billion, five hundred forty-two million, six hundred forty-three thousand, eight hundred fifty-one".