2492387781 has 16 divisors (see below), whose sum is σ = 3587337600. Its totient is φ = 1530123840.

The previous prime is 2492387767. The next prime is 2492387783. The reversal of 2492387781 is 1877832942.

It is not a de Polignac number, because 2492387781 - 2⁵ = 2492387749 is a prime.

It is a super-2 number, since 2×2492387781² = 12423993701756207922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2492387783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59481 + ... + 92318.

It is an arithmetic number, because the mean of its divisors is an integer number (224208600).

Almost surely, 2^2492387781 is an apocalyptic number.

It is an amenable number.

2492387781 is a deficient number, since it is larger than the sum of its proper divisors (1094949819).

2492387781 is a wasteful number, since it uses less digits than its factorization.

2492387781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152236.

The product of its digits is 1354752, while the sum is 51.

The square root of 2492387781 is about 49923.8197757343. The cubic root of 2492387781 is about 1355.8298917100.

The spelling of 2492387781 in words is "two billion, four hundred ninety-two million, three hundred eighty-seven thousand, seven hundred eighty-one".