84621994457 has 32 divisors (see below), whose sum is σ = 114660860160. Its totient is φ = 60308478720.

The previous prime is 84621994361. The next prime is 84621994463. The reversal of 84621994457 is 75449912648.

It is not a de Polignac number, because 84621994457 - 2¹⁸ = 84621732313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84621994396 and 84621994405.

It is not an unprimeable number, because it can be changed into a prime (84621994957) 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, 278678 + ... + 496895.

It is an arithmetic number, because the mean of its divisors is an integer number (3583151880).

Almost surely, 2^84621994457 is an apocalyptic number.

It is an amenable number.

84621994457 is a deficient number, since it is larger than the sum of its proper divisors (30038865703).

84621994457 is a wasteful number, since it uses less digits than its factorization.

84621994457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775713.

The product of its digits is 17418240, while the sum is 59.

The spelling of 84621994457 in words is "eighty-four billion, six hundred twenty-one million, nine hundred ninety-four thousand, four hundred fifty-seven".