3997091223520 has 24 divisors (see below), whose sum is σ = 9443128015944. Its totient is φ = 1598836489344.

The previous prime is 3997091223509. The next prime is 3997091223547. The reversal of 3997091223520 is 253221907993.

It is a super-2 number, since 2×3997091223520² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12490909914 + ... + 12490910233.

It is an arithmetic number, because the mean of its divisors is an integer number (393463667331).

Almost surely, 2^{3997091223520} is an apocalyptic number.

It is an amenable number.

3997091223520 is an abundant number, since it is smaller than the sum of its proper divisors (5446036792424).

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

3997091223520 is a wasteful number, since it uses less digits than its factorization.

3997091223520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24981820162 (or 24981820154 counting only the distinct ones).

The product of its (nonzero) digits is 1837080, while the sum is 52.

The spelling of 3997091223520 in words is "three trillion, nine hundred ninety-seven billion, ninety-one million, two hundred twenty-three thousand, five hundred twenty".