3720565491 has 16 divisors (see below), whose sum is σ = 5202470400. Its totient is φ = 2360603520.

The previous prime is 3720565483. The next prime is 3720565493. The reversal of 3720565491 is 1945650273.

It is not a de Polignac number, because 3720565491 - 2³ = 3720565483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3720565493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121750 + ... + 149211.

It is an arithmetic number, because the mean of its divisors is an integer number (325154400).

Almost surely, 2^3720565491 is an apocalyptic number.

3720565491 is a deficient number, since it is larger than the sum of its proper divisors (1481904909).

3720565491 is a wasteful number, since it uses less digits than its factorization.

3720565491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271186.

The product of its (nonzero) digits is 226800, while the sum is 42.

The square root of 3720565491 is about 60996.4383468412. The cubic root of 3720565491 is about 1549.5406881857.

The spelling of 3720565491 in words is "three billion, seven hundred twenty million, five hundred sixty-five thousand, four hundred ninety-one".