5640420098 has 4 divisors (see below), whose sum is σ = 8460630150. Its totient is φ = 2820210048.

The previous prime is 5640420091. The next prime is 5640420101. The reversal of 5640420098 is 8900240465.

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

It can be written as a sum of positive squares in only one way, i.e., 5635955329 + 4464769 = 75073^2 + 2113^2 .

It is not an unprimeable number, because it can be changed into a prime (5640420091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1410105023 + ... + 1410105026.

Almost surely, 2^5640420098 is an apocalyptic number.

5640420098 is a deficient number, since it is larger than the sum of its proper divisors (2820210052).

5640420098 is a wasteful number, since it uses less digits than its factorization.

5640420098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2820210051.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 5640420098 is about 75102.7302965744. The cubic root of 5640420098 is about 1780.0702848567.

The spelling of 5640420098 in words is "five billion, six hundred forty million, four hundred twenty thousand, ninety-eight".