11906597840 has 40 divisors (see below), whose sum is σ = 28062070728. Its totient is φ = 4697395200.

The previous prime is 11906597809. The next prime is 11906597917. The reversal of 11906597840 is 4879560911.

It can be written as a sum of positive squares in 4 ways, for example, as 4646876224 + 7259721616 = 68168^2 + 85204^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 1013561 + ... + 1025240.

Almost surely, 2^11906597840 is an apocalyptic number.

11906597840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11906597840 is an abundant number, since it is smaller than the sum of its proper divisors (16155472888).

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

11906597840 is a wasteful number, since it uses less digits than its factorization.

11906597840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038887 (or 2038881 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 50.

The spelling of 11906597840 in words is "eleven billion, nine hundred six million, five hundred ninety-seven thousand, eight hundred forty".