6894157980 has 96 divisors (see below), whose sum is σ = 20409903360. Its totient is φ = 1733944320.

The previous prime is 6894157973. The next prime is 6894158003. The reversal of 6894157980 is 897514986.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a self number, because there is not a number n which added to its sum of digits gives 6894157980.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 245460 + ... + 272100.

It is an arithmetic number, because the mean of its divisors is an integer number (212603160).

Almost surely, 2^6894157980 is an apocalyptic number.

6894157980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6894157980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10204951680).

6894157980 is an abundant number, since it is smaller than the sum of its proper divisors (13515745380).

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

6894157980 is a wasteful number, since it uses less digits than its factorization.

6894157980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26899 (or 26897 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 57.

The square root of 6894157980 is about 83031.0663547085. The cubic root of 6894157980 is about 1903.2408198850.

The spelling of 6894157980 in words is "six billion, eight hundred ninety-four million, one hundred fifty-seven thousand, nine hundred eighty".