3697991421696 has 432 divisors, whose sum is σ = 12944798432160. Its totient is φ = 1034400153600.

The previous prime is 3697991421689. The next prime is 3697991421779. The reversal of 3697991421696 is 6961241997963.

3697991421696 is a `hidden beast` number, since 369 + 7 + 99 + 14 + 2 + 169 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (432).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10702516 + ... + 11042636.

Almost surely, 2^{3697991421696} is an apocalyptic number.

3697991421696 is a gapful number since it is divisible by the number (36) 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 3697991421696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6472399216080).

3697991421696 is an abundant number, since it is smaller than the sum of its proper divisors (9246807010464).

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

3697991421696 is a wasteful number, since it uses less digits than its factorization.

3697991421696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340181 (or 340150 counting only the distinct ones).

The product of its digits is 238085568, while the sum is 72.

The spelling of 3697991421696 in words is "three trillion, six hundred ninety-seven billion, nine hundred ninety-one million, four hundred twenty-one thousand, six hundred ninety-six".