2691494140 has 24 divisors (see below), whose sum is σ = 5672121840. Its totient is φ = 1072791168.

The previous prime is 2691494119. The next prime is 2691494189. The reversal of 2691494140 is 414941962.

2691494140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 2691494093 and 2691494102.

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, 232105 + ... + 243424.

It is an arithmetic number, because the mean of its divisors is an integer number (236338410).

Almost surely, 2^2691494140 is an apocalyptic number.

2691494140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2691494140 is an abundant number, since it is smaller than the sum of its proper divisors (2980627700).

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

2691494140 is a wasteful number, since it uses less digits than its factorization.

2691494140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475821 (or 475819 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 2691494140 is about 51879.6119877549. The cubic root of 2691494140 is about 1391.0128635490.

The spelling of 2691494140 in words is "two billion, six hundred ninety-one million, four hundred ninety-four thousand, one hundred forty".