6405120502 has 16 divisors (see below), whose sum is σ = 10486198800. Its totient is φ = 2910003840.

The previous prime is 6405120499. The next prime is 6405120503. The reversal of 6405120502 is 2050215046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6405120503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23727 + ... + 115642.

It is an arithmetic number, because the mean of its divisors is an integer number (655387425).

Almost surely, 2^6405120502 is an apocalyptic number.

6405120502 is a deficient number, since it is larger than the sum of its proper divisors (4081078298).

6405120502 is a wasteful number, since it uses less digits than its factorization.

6405120502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141471.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 6405120502 is about 80031.9967388044. The cubic root of 6405120502 is about 1857.1305528027.

Adding to 6405120502 its reverse (2050215046), we get a palindrome (8455335548).

The spelling of 6405120502 in words is "six billion, four hundred five million, one hundred twenty thousand, five hundred two".