5621780823771 has 8 divisors (see below), whose sum is σ = 8566523160064. Its totient is φ = 3212446185000.

The previous prime is 5621780823683. The next prime is 5621780823809. The reversal of 5621780823771 is 1773280871265.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5621780823771 - 2⁷ = 5621780823643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5621780822771) 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, 133851924355 + ... + 133851924396.

It is an arithmetic number, because the mean of its divisors is an integer number (1070815395008).

Almost surely, 2^{5621780823771} is an apocalyptic number.

5621780823771 is a deficient number, since it is larger than the sum of its proper divisors (2944742336293).

5621780823771 is a wasteful number, since it uses less digits than its factorization.

5621780823771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267703848761.

The product of its (nonzero) digits is 7902720, while the sum is 57.

The spelling of 5621780823771 in words is "five trillion, six hundred twenty-one billion, seven hundred eighty million, eight hundred twenty-three thousand, seven hundred seventy-one".