6491239630 has 32 divisors (see below), whose sum is σ = 12222819648. Its totient is φ = 2477376000.

The previous prime is 6491239627. The next prime is 6491239639. The reversal of 6491239630 is 369321946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6491239639) 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, 57040 + ... + 127420.

It is an arithmetic number, because the mean of its divisors is an integer number (381963114).

Almost surely, 2^6491239630 is an apocalyptic number.

6491239630 is a deficient number, since it is larger than the sum of its proper divisors (5731580018).

6491239630 is a wasteful number, since it uses less digits than its factorization.

6491239630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70812.

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 6491239630 is about 80568.2296566084. The cubic root of 6491239630 is about 1865.4167866286.

The spelling of 6491239630 in words is "six billion, four hundred ninety-one million, two hundred thirty-nine thousand, six hundred thirty".