2491576401 has 4 divisors (see below), whose sum is σ = 3322101872. Its totient is φ = 1661050932.

The previous prime is 2491576397. The next prime is 2491576403. The reversal of 2491576401 is 1046751942.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2491576401 - 2² = 2491576397 is a prime.

It is a super-2 number, since 2×2491576401² = 12415905924040225602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2491576401.

It is not an unprimeable number, because it can be changed into a prime (2491576403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 415262731 + ... + 415262736.

It is an arithmetic number, because the mean of its divisors is an integer number (830525468).

Almost surely, 2^2491576401 is an apocalyptic number.

It is an amenable number.

2491576401 is a deficient number, since it is larger than the sum of its proper divisors (830525471).

2491576401 is an equidigital number, since it uses as much as digits as its factorization.

2491576401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830525470.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 2491576401 is about 49915.6929331849. The cubic root of 2491576401 is about 1355.6827486553.

The spelling of 2491576401 in words is "two billion, four hundred ninety-one million, five hundred seventy-six thousand, four hundred one".