1951685268 has 96 divisors (see below), whose sum is σ = 5108732160. Its totient is φ = 575769600.

The previous prime is 1951685261. The next prime is 1951685273. The reversal of 1951685268 is 8625861591.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1951685268.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1951685261) 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, 681696 + ... + 684552.

It is an arithmetic number, because the mean of its divisors is an integer number (53215960).

Almost surely, 2^1951685268 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1951685268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2554366080).

1951685268 is an abundant number, since it is smaller than the sum of its proper divisors (3157046892).

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

1951685268 is a wasteful number, since it uses less digits than its factorization.

1951685268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3057 (or 3055 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 51.

The square root of 1951685268 is about 44177.8821131118. The cubic root of 1951685268 is about 1249.6927816730.

The spelling of 1951685268 in words is "one billion, nine hundred fifty-one million, six hundred eighty-five thousand, two hundred sixty-eight".