2691696420 has 432 divisors, whose sum is σ = 10038712320. Its totient is φ = 603542016.

The previous prime is 2691696401. The next prime is 2691696433. The reversal of 2691696420 is 246961962.

2691696420 is a `hidden beast` number, since 2 + 69 + 169 + 6 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 21194397 + ... + 21194523.

It is an arithmetic number, because the mean of its divisors is an integer number (23237760).

Almost surely, 2^2691696420 is an apocalyptic number.

2691696420 is a gapful number since it is divisible by the number (20) 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 2691696420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5019356160).

2691696420 is an abundant number, since it is smaller than the sum of its proper divisors (7347015900).

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

2691696420 is a wasteful number, since it uses less digits than its factorization.

2691696420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 2691696420 is about 51881.5614645512. The cubic root of 2691696420 is about 1391.0477099972.

The spelling of 2691696420 in words is "two billion, six hundred ninety-one million, six hundred ninety-six thousand, four hundred twenty".