6521016142 has 8 divisors (see below), whose sum is σ = 9841534056. Its totient is φ = 3240504792.

The previous prime is 6521016121. The next prime is 6521016157. The reversal of 6521016142 is 2416101256.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 6521016142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10001233 + ... + 10001884.

It is an arithmetic number, because the mean of its divisors is an integer number (1230191757).

Almost surely, 2^6521016142 is an apocalyptic number.

6521016142 is a deficient number, since it is larger than the sum of its proper divisors (3320517914).

6521016142 is a wasteful number, since it uses less digits than its factorization.

6521016142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20003282.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 6521016142 is about 80752.8088799393. The cubic root of 6521016142 is about 1868.2647731272.

Adding to 6521016142 its reverse (2416101256), we get a palindrome (8937117398).

The spelling of 6521016142 in words is "six billion, five hundred twenty-one million, sixteen thousand, one hundred forty-two".