3652487991 has 16 divisors (see below), whose sum is σ = 5417701120. Its totient is φ = 2432018520.

The previous prime is 3652487987. The next prime is 3652488031. The reversal of 3652487991 is 1997842563.

3652487991 is a `hidden beast` number, since 36 + 524 + 87 + 9 + 9 + 1 = 666.

It is not a de Polignac number, because 3652487991 - 2² = 3652487987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3652487191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59965 + ... + 104406.

It is an arithmetic number, because the mean of its divisors is an integer number (338606320).

Almost surely, 2^3652487991 is an apocalyptic number.

3652487991 is a deficient number, since it is larger than the sum of its proper divisors (1765213129).

3652487991 is a wasteful number, since it uses less digits than its factorization.

3652487991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165203 (or 165197 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 3652487991 is about 60435.8171203137. The cubic root of 3652487991 is about 1540.0314817593.

The spelling of 3652487991 in words is "three billion, six hundred fifty-two million, four hundred eighty-seven thousand, nine hundred ninety-one".