821674367901 has 24 divisors (see below), whose sum is σ = 1227556062720. Its totient is φ = 529070925600.

The previous prime is 821674367869. The next prime is 821674367903. The reversal of 821674367901 is 109763476128.

821674367901 is a `hidden beast` number, since 82 + 1 + 67 + 436 + 79 + 0 + 1 = 666.

It is not a de Polignac number, because 821674367901 - 2⁵ = 821674367869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821674367903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2750985 + ... + 3035006.

It is an arithmetic number, because the mean of its divisors is an integer number (51148169280).

Almost surely, 2^821674367901 is an apocalyptic number.

It is an amenable number.

821674367901 is a deficient number, since it is larger than the sum of its proper divisors (405881694819).

821674367901 is a wasteful number, since it uses less digits than its factorization.

821674367901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5786537 (or 5786534 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 821674367901 in words is "eight hundred twenty-one billion, six hundred seventy-four million, three hundred sixty-seven thousand, nine hundred one".