6403958698 has 8 divisors (see below), whose sum is σ = 9937177380. Its totient is φ = 3091566240.

The previous prime is 6403958689. The next prime is 6403958699. The reversal of 6403958698 is 8968593046.

It can be written as a sum of positive squares in 2 ways, for example, as 6330907489 + 73051209 = 79567^2 + 8547^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (58), and also a Moran number because the ratio is a prime number: 110413081 = 6403958698 / (6 + 4 + 0 + 3 + 9 + 5 + 8 + 6 + 9 + 8).

It is not an unprimeable number, because it can be changed into a prime (6403958699) 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, 55206483 + ... + 55206598.

Almost surely, 2^6403958698 is an apocalyptic number.

6403958698 is a deficient number, since it is larger than the sum of its proper divisors (3533218682).

6403958698 is a wasteful number, since it uses less digits than its factorization.

6403958698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110413112.

The product of its (nonzero) digits is 11197440, while the sum is 58.

The square root of 6403958698 is about 80024.7380376843. The cubic root of 6403958698 is about 1857.0182597203.

The spelling of 6403958698 in words is "six billion, four hundred three million, nine hundred fifty-eight thousand, six hundred ninety-eight".