2450878661 has 48 divisors (see below), whose sum is σ = 3266558592. Its totient is φ = 1786060800.

The previous prime is 2450878603. The next prime is 2450878687. The reversal of 2450878661 is 1668780542.

It is not a de Polignac number, because 2450878661 - 2³⁰ = 1377136837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2450578661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5362745 + ... + 5363201.

It is an arithmetic number, because the mean of its divisors is an integer number (68053304).

Almost surely, 2^2450878661 is an apocalyptic number.

It is an amenable number.

2450878661 is a deficient number, since it is larger than the sum of its proper divisors (815679931).

2450878661 is a wasteful number, since it uses less digits than its factorization.

2450878661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750 (or 733 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 47.

The square root of 2450878661 is about 49506.3497038511. The cubic root of 2450878661 is about 1348.2608901734.

The spelling of 2450878661 in words is "two billion, four hundred fifty million, eight hundred seventy-eight thousand, six hundred sixty-one".