6521164532 has 6 divisors (see below), whose sum is σ = 11412037938. Its totient is φ = 3260582264.

The previous prime is 6521164511. The next prime is 6521164543. The reversal of 6521164532 is 2354611256.

It can be written as a sum of positive squares in only one way, i.e., 6516687076 + 4477456 = 80726^2 + 2116^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6521164492 and 6521164501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815145563 + ... + 815145570.

It is an arithmetic number, because the mean of its divisors is an integer number (1902006323).

Almost surely, 2^6521164532 is an apocalyptic number.

It is an amenable number.

6521164532 is a deficient number, since it is larger than the sum of its proper divisors (4890873406).

6521164532 is a wasteful number, since it uses less digits than its factorization.

6521164532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630291137 (or 1630291135 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 6521164532 is about 80753.7276662818. The cubic root of 6521164532 is about 1868.2789442166.

Adding to 6521164532 its reverse (2354611256), we get a palindrome (8875775788).

The spelling of 6521164532 in words is "six billion, five hundred twenty-one million, one hundred sixty-four thousand, five hundred thirty-two".