6985781854 has 16 divisors (see below), whose sum is σ = 10670026896. Its totient is φ = 3429316800.

The previous prime is 6985781827. The next prime is 6985781863. The reversal of 6985781854 is 4581875896.

It is a super-2 number, since 2×6985781854² = 97602296223351354632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a junction number, because it is equal to n+sod(n) for n = 6985781792 and 6985781801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14394 + ... + 119074.

It is an arithmetic number, because the mean of its divisors is an integer number (666876681).

Almost surely, 2^6985781854 is an apocalyptic number.

6985781854 is a deficient number, since it is larger than the sum of its proper divisors (3684245042).

6985781854 is a wasteful number, since it uses less digits than its factorization.

6985781854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105291.

The product of its digits is 19353600, while the sum is 61.

The square root of 6985781854 is about 83580.9897883484. The cubic root of 6985781854 is about 1911.6351460862.

The spelling of 6985781854 in words is "six billion, nine hundred eighty-five million, seven hundred eighty-one thousand, eight hundred fifty-four".