1648561901874 has 32 divisors (see below), whose sum is σ = 3524966190720. Its totient is φ = 512174568192.

The previous prime is 1648561901851. The next prime is 1648561901881. The reversal of 1648561901874 is 4781091658461.

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, 78447609 + ... + 78468620.

It is an arithmetic number, because the mean of its divisors is an integer number (110155193460).

Almost surely, 2^{1648561901874} is an apocalyptic number.

1648561901874 is an abundant number, since it is smaller than the sum of its proper divisors (1876404288846).

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

1648561901874 is a wasteful number, since it uses less digits than its factorization.

1648561901874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156916354.

The product of its (nonzero) digits is 11612160, while the sum is 60.

The spelling of 1648561901874 in words is "one trillion, six hundred forty-eight billion, five hundred sixty-one million, nine hundred one thousand, eight hundred seventy-four".