84400687953 has 12 divisors (see below), whose sum is σ = 121922481408. Its totient is φ = 56262336120.

The previous prime is 84400687951. The next prime is 84400687961. The reversal of 84400687953 is 35978600448.

It is not a de Polignac number, because 84400687953 - 2¹ = 84400687951 is a prime.

It is a super-2 number, since 2×84400687953² (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 self number, because there is not a number n which added to its sum of digits gives 84400687953.

It is not an unprimeable number, because it can be changed into a prime (84400687951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 285793 + ... + 500478.

It is an arithmetic number, because the mean of its divisors is an integer number (10160206784).

Almost surely, 2^84400687953 is an apocalyptic number.

It is an amenable number.

84400687953 is a deficient number, since it is larger than the sum of its proper divisors (37521793455).

84400687953 is a wasteful number, since it uses less digits than its factorization.

84400687953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798204 (or 798201 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 84400687953 in words is "eighty-four billion, four hundred million, six hundred eighty-seven thousand, nine hundred fifty-three".