3906516491 has 8 divisors (see below), whose sum is σ = 4034242944. Its totient is φ = 3778896960.

The previous prime is 3906516473. The next prime is 3906516521. The reversal of 3906516491 is 1946156093.

3906516491 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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 3906516491 - 2¹⁸ = 3906254347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3906516431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51185 + ... + 102141.

It is an arithmetic number, because the mean of its divisors is an integer number (504280368).

Almost surely, 2^3906516491 is an apocalyptic number.

3906516491 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3906516491 is a deficient number, since it is larger than the sum of its proper divisors (127726453).

3906516491 is a wasteful number, since it uses less digits than its factorization.

3906516491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53461.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 3906516491 is about 62502.1318916403. The cubic root of 3906516491 is about 1574.9371257004.

The spelling of 3906516491 in words is "three billion, nine hundred six million, five hundred sixteen thousand, four hundred ninety-one".