2494643381 has 8 divisors (see below), whose sum is σ = 2554894104. Its totient is φ = 2435097600.

The previous prime is 2494643353. The next prime is 2494643383. The reversal of 2494643381 is 1833464942.

2494643381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 235162225 + 2259481156 = 15335^2 + 47534^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2494643381 is a prime.

It is a super-2 number, since 2×2494643381² = 12446491196734222322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2494643383) 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, 169070 + ... + 183231.

It is an arithmetic number, because the mean of its divisors is an integer number (319361763).

Almost surely, 2^2494643381 is an apocalyptic number.

It is an amenable number.

2494643381 is a deficient number, since it is larger than the sum of its proper divisors (60250723).

2494643381 is an equidigital number, since it uses as much as digits as its factorization.

2494643381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352471.

The product of its digits is 497664, while the sum is 44.

The square root of 2494643381 is about 49946.4050858518. The cubic root of 2494643381 is about 1356.2387750888.

The spelling of 2494643381 in words is "two billion, four hundred ninety-four million, six hundred forty-three thousand, three hundred eighty-one".