6581491950 has 48 divisors (see below), whose sum is σ = 17805931776. Its totient is φ = 1595512800.

The previous prime is 6581491937. The next prime is 6581491981. The reversal of 6581491950 is 591941856.

It is a self number, because there is not a number n which added to its sum of digits gives 6581491950.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1992742 + ... + 1996041.

It is an arithmetic number, because the mean of its divisors is an integer number (370956912).

Almost surely, 2^6581491950 is an apocalyptic number.

6581491950 is an abundant number, since it is smaller than the sum of its proper divisors (11224439826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6581491950 is a wasteful number, since it uses less digits than its factorization.

6581491950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3988809 (or 3988804 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 48.

The square root of 6581491950 is about 81126.3949032619. The cubic root of 6581491950 is about 1874.0224308576.

The spelling of 6581491950 in words is "six billion, five hundred eighty-one million, four hundred ninety-one thousand, nine hundred fifty".