84294781623 has 32 divisors (see below), whose sum is σ = 136494713600. Its totient is φ = 51099463008.

The previous prime is 84294781619. The next prime is 84294781631. The reversal of 84294781623 is 32618749248.

84294781623 is a `hidden beast` number, since 8 + 4 + 2 + 9 + 4 + 7 + 8 + 1 + 623 = 666.

It is not a de Polignac number, because 84294781623 - 2² = 84294781619 is a prime.

It is a super-2 number, since 2×84294781623² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84294781623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84294782623) 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, 1768693 + ... + 1815726.

It is an arithmetic number, because the mean of its divisors is an integer number (4265459800).

Almost surely, 2^84294781623 is an apocalyptic number.

84294781623 is a deficient number, since it is larger than the sum of its proper divisors (52199931977).

84294781623 is a wasteful number, since it uses less digits than its factorization.

84294781623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3584508 (or 3584502 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The spelling of 84294781623 in words is "eighty-four billion, two hundred ninety-four million, seven hundred eighty-one thousand, six hundred twenty-three".