6521642525442 has 16 divisors (see below), whose sum is σ = 14229038237472. Its totient is φ = 1976255310720.

The previous prime is 6521642525429. The next prime is 6521642525459. The reversal of 6521642525442 is 2445252461256.

It is a junction number, because it is equal to n+sod(n) for n = 6521642525391 and 6521642525400.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49406382703 + ... + 49406382834.

It is an arithmetic number, because the mean of its divisors is an integer number (889314889842).

Almost surely, 2^{6521642525442} is an apocalyptic number.

6521642525442 is an abundant number, since it is smaller than the sum of its proper divisors (7707395712030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6521642525442 is a wasteful number, since it uses less digits than its factorization.

6521642525442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98812765553.

The product of its digits is 4608000, while the sum is 48.

Adding to 6521642525442 its reverse (2445252461256), we get a palindrome (8966894986698).

The spelling of 6521642525442 in words is "six trillion, five hundred twenty-one billion, six hundred forty-two million, five hundred twenty-five thousand, four hundred forty-two".