3991597055 has 8 divisors (see below), whose sum is σ = 4850548800. Its totient is φ = 3152856096.

The previous prime is 3991597009. The next prime is 3991597061. The reversal of 3991597055 is 5507951993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3991597055 - 2¹⁸ = 3991334911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3991596988 and 3991597006.

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, 5052260 + ... + 5053049.

It is an arithmetic number, because the mean of its divisors is an integer number (606318600).

Almost surely, 2^3991597055 is an apocalyptic number.

3991597055 is a deficient number, since it is larger than the sum of its proper divisors (858951745).

3991597055 is a wasteful number, since it uses less digits than its factorization.

3991597055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10105393.

The product of its (nonzero) digits is 1913625, while the sum is 53.

The square root of 3991597055 is about 63179.0871649789. The cubic root of 3991597055 is about 1586.2887023754.

The spelling of 3991597055 in words is "three billion, nine hundred ninety-one million, five hundred ninety-seven thousand, fifty-five".