6520061642 has 4 divisors (see below), whose sum is σ = 9780092466. Its totient is φ = 3260030820.

The previous prime is 6520061627. The next prime is 6520061657. The reversal of 6520061642 is 2461600256.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (6520061627) and next prime (6520061657).

It can be written as a sum of positive squares in only one way, i.e., 4102274401 + 2417787241 = 64049^2 + 49171^2 .

It is a super-2 number, since 2×6520061642² = 85022407630959472328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6520061599 and 6520061608.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1630015409 + ... + 1630015412.

Almost surely, 2^6520061642 is an apocalyptic number.

6520061642 is a deficient number, since it is larger than the sum of its proper divisors (3260030824).

6520061642 is a wasteful number, since it uses less digits than its factorization.

6520061642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3260030823.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 6520061642 is about 80746.8986525179. The cubic root of 6520061642 is about 1868.1736142392.

Adding to 6520061642 its reverse (2461600256), we get a palindrome (8981661898).

The spelling of 6520061642 in words is "six billion, five hundred twenty million, sixty-one thousand, six hundred forty-two".