2545401649 has 8 divisors (see below), whose sum is σ = 2909422208. Its totient is φ = 2181479040.

The previous prime is 2545401629. The next prime is 2545401667. The reversal of 2545401649 is 9461045452.

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-2545401649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2545401629) 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, 43969 + ... + 83809.

It is an arithmetic number, because the mean of its divisors is an integer number (363677776).

Almost surely, 2^2545401649 is an apocalyptic number.

It is an amenable number.

2545401649 is a deficient number, since it is larger than the sum of its proper divisors (364020559).

2545401649 is an equidigital number, since it uses as much as digits as its factorization.

2545401649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48975.

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 2545401649 is about 50451.9736878549. The cubic root of 2545401649 is about 1365.3755042177.

The spelling of 2545401649 in words is "two billion, five hundred forty-five million, four hundred one thousand, six hundred forty-nine".