2491148256 has 96 divisors (see below), whose sum is σ = 6876122400. Its totient is φ = 788551680.

The previous prime is 2491148249. The next prime is 2491148263. The reversal of 2491148256 is 6528411942.

It is an interprime number because it is at equal distance from previous prime (2491148249) and next prime (2491148263).

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162490 + ... + 177158.

It is an arithmetic number, because the mean of its divisors is an integer number (71626275).

Almost surely, 2^2491148256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2491148256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3438061200).

2491148256 is an abundant number, since it is smaller than the sum of its proper divisors (4384974144).

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

2491148256 is a wasteful number, since it uses less digits than its factorization.

2491148256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14772 (or 14764 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 2491148256 is about 49911.4040676076. The cubic root of 2491148256 is about 1355.6050920574.

The spelling of 2491148256 in words is "two billion, four hundred ninety-one million, one hundred forty-eight thousand, two hundred fifty-six".