63949490251 has 8 divisors (see below), whose sum is σ = 64157439600. Its totient is φ = 63741857760.

The previous prime is 63949490233. The next prime is 63949490263. The reversal of 63949490251 is 15209494936.

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 63949490251 - 2⁵ = 63949490219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63949490051) 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, 328485 + ... + 485593.

It is an arithmetic number, because the mean of its divisors is an integer number (8019679950).

Almost surely, 2^63949490251 is an apocalyptic number.

63949490251 is a deficient number, since it is larger than the sum of its proper divisors (207949349).

63949490251 is a wasteful number, since it uses less digits than its factorization.

63949490251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158429.

The product of its (nonzero) digits is 2099520, while the sum is 52.

The spelling of 63949490251 in words is "sixty-three billion, nine hundred forty-nine million, four hundred ninety thousand, two hundred fifty-one".