5651899721787 has 32 divisors (see below), whose sum is σ = 8338590766080. Its totient is φ = 3376516216320.

The previous prime is 5651899721773. The next prime is 5651899721813. The reversal of 5651899721787 is 7871279981565.

5651899721787 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5651899721787 - 2¹⁸ = 5651899459643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5651899721747) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 170238 + ... + 3366419.

It is an arithmetic number, because the mean of its divisors is an integer number (260580961440).

Almost surely, 2^{5651899721787} is an apocalyptic number.

5651899721787 is a deficient number, since it is larger than the sum of its proper divisors (2686691044293).

5651899721787 is a wasteful number, since it uses less digits than its factorization.

5651899721787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3537363.

The product of its digits is 533433600, while the sum is 75.

The spelling of 5651899721787 in words is "five trillion, six hundred fifty-one billion, eight hundred ninety-nine million, seven hundred twenty-one thousand, seven hundred eighty-seven".