2491254780 has 48 divisors (see below), whose sum is σ = 7972016640. Its totient is φ = 569429568.

The previous prime is 2491254739. The next prime is 2491254791. The reversal of 2491254780 is 874521942.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2965360 + ... + 2966199.

It is an arithmetic number, because the mean of its divisors is an integer number (166083680).

Almost surely, 2^2491254780 is an apocalyptic number.

2491254780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2491254780 is an abundant number, since it is smaller than the sum of its proper divisors (5480761860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2491254780 is a wasteful number, since it uses less digits than its factorization.

2491254780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5931578 (or 5931576 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 2491254780 is about 49912.4711870691. The cubic root of 2491254780 is about 1355.6244141268.

The spelling of 2491254780 in words is "two billion, four hundred ninety-one million, two hundred fifty-four thousand, seven hundred eighty".