6420025498 has 4 divisors (see below), whose sum is σ = 9630038250. Its totient is φ = 3210012748.

The previous prime is 6420025477. The next prime is 6420025499. The reversal of 6420025498 is 8945200246.

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., 5656995369 + 763030129 = 75213^2 + 27623^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6420025498.

It is not an unprimeable number, because it can be changed into a prime (6420025499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1605006373 + ... + 1605006376.

Almost surely, 2^6420025498 is an apocalyptic number.

6420025498 is a deficient number, since it is larger than the sum of its proper divisors (3210012752).

6420025498 is a wasteful number, since it uses less digits than its factorization.

6420025498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3210012751.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 6420025498 is about 80125.0616099607. The cubic root of 6420025498 is about 1858.5699782282.

It can be divided in two parts, 64200 and 25498, that added together give a palindrome (89698).

The spelling of 6420025498 in words is "six billion, four hundred twenty million, twenty-five thousand, four hundred ninety-eight".