6449698901 has 4 divisors (see below), whose sum is σ = 6829092972. Its totient is φ = 6070304832.

The previous prime is 6449698757. The next prime is 6449698951. The reversal of 6449698901 is 1098969446.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4807342225 + 1642356676 = 69335^2 + 40526^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6449698901 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6449698951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189697010 + ... + 189697043.

It is an arithmetic number, because the mean of its divisors is an integer number (1707273243).

Almost surely, 2^6449698901 is an apocalyptic number.

It is an amenable number.

6449698901 is a deficient number, since it is larger than the sum of its proper divisors (379394071).

6449698901 is a wasteful number, since it uses less digits than its factorization.

6449698901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379394070.

The product of its (nonzero) digits is 3359232, while the sum is 56.

The square root of 6449698901 is about 80310.0174386732. The cubic root of 6449698901 is about 1861.4290190763.

The spelling of 6449698901 in words is "six billion, four hundred forty-nine million, six hundred ninety-eight thousand, nine hundred one".