6401720802 has 32 divisors (see below), whose sum is σ = 12903698304. Its totient is φ = 2117232000.

The previous prime is 6401720779. The next prime is 6401720803. The reversal of 6401720802 is 2080271046.

It is a self number, because there is not a number n which added to its sum of digits gives 6401720802.

It is not an unprimeable number, because it can be changed into a prime (6401720803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 845152 + ... + 852692.

It is an arithmetic number, because the mean of its divisors is an integer number (403240572).

Almost surely, 2^6401720802 is an apocalyptic number.

6401720802 is an abundant number, since it is smaller than the sum of its proper divisors (6501977502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6401720802 is a wasteful number, since it uses less digits than its factorization.

6401720802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8634.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 6401720802 is about 80010.7542896578. The cubic root of 6401720802 is about 1856.8019196867.

Adding to 6401720802 its reverse (2080271046), we get a palindrome (8481991848).

The spelling of 6401720802 in words is "six billion, four hundred one million, seven hundred twenty thousand, eight hundred two".