5651820721600 has 84 divisors (see below), whose sum is σ = 14230430405224. Its totient is φ = 2208153185280.

The previous prime is 5651820721559. The next prime is 5651820721621. The reversal of 5651820721600 is 61270281565.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41005479 + ... + 41143078.

Almost surely, 2^{5651820721600} is an apocalyptic number.

5651820721600 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

5651820721600 is an abundant number, since it is smaller than the sum of its proper divisors (8578609683624).

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

5651820721600 is a wasteful number, since it uses less digits than its factorization.

5651820721600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82148622 (or 82148607 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 5651820721600 in words is "five trillion, six hundred fifty-one billion, eight hundred twenty million, seven hundred twenty-one thousand, six hundred".