6420540332 has 6 divisors (see below), whose sum is σ = 11235945588. Its totient is φ = 3210270164.

The previous prime is 6420540239. The next prime is 6420540341. The reversal of 6420540332 is 2330450246.

It is a junction number, because it is equal to n+sod(n) for n = 6420540295 and 6420540304.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802567538 + ... + 802567545.

It is an arithmetic number, because the mean of its divisors is an integer number (1872657598).

Almost surely, 2^6420540332 is an apocalyptic number.

It is an amenable number.

6420540332 is a deficient number, since it is larger than the sum of its proper divisors (4815405256).

6420540332 is a wasteful number, since it uses less digits than its factorization.

6420540332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605135087 (or 1605135085 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 29.

The square root of 6420540332 is about 80128.2742357528. The cubic root of 6420540332 is about 1858.6196576488.

Adding to 6420540332 its reverse (2330450246), we get a palindrome (8750990578).

The spelling of 6420540332 in words is "six billion, four hundred twenty million, five hundred forty thousand, three hundred thirty-two".