853144693974 has 96 divisors (see below), whose sum is σ = 1907398022400. Its totient is φ = 275392892736.

The previous prime is 853144693967. The next prime is 853144693987. The reversal of 853144693974 is 479396441358.

853144693974 is a `hidden beast` number, since 8 + 5 + 31 + 446 + 93 + 9 + 74 = 666.

It is a super-2 number, since 2×853144693974² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 138427017 + ... + 138433179.

It is an arithmetic number, because the mean of its divisors is an integer number (19868729400).

Almost surely, 2^853144693974 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 853144693974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (953699011200).

853144693974 is an abundant number, since it is smaller than the sum of its proper divisors (1054253328426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

853144693974 is a wasteful number, since it uses less digits than its factorization.

853144693974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7154 (or 7151 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 63.

The spelling of 853144693974 in words is "eight hundred fifty-three billion, one hundred forty-four million, six hundred ninety-three thousand, nine hundred seventy-four".