3691139235840 has 1632 divisors, whose sum is σ = 15457989456000. Its totient is φ = 813862748160.

The previous prime is 3691139235821. The next prime is 3691139235853. The reversal of 3691139235840 is 485329311963.

3691139235840 is a `hidden beast` number, since 3 + 6 + 9 + 1 + 1 + 39 + 23 + 584 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 41473474516 + ... + 41473474604.

Almost surely, 2^{3691139235840} is an apocalyptic number.

3691139235840 is a gapful number since it is divisible by the number (30) 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 3691139235840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7728994728000).

3691139235840 is an abundant number, since it is smaller than the sum of its proper divisors (11766850220160).

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

3691139235840 is an frugal number, since it uses more digits than its factorization.

3691139235840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 3691139235840 in words is "three trillion, six hundred ninety-one billion, one hundred thirty-nine million, two hundred thirty-five thousand, eight hundred forty".