102406021646 has 8 divisors (see below), whose sum is σ = 154051710840. Its totient is φ = 51055451368.

The previous prime is 102406021607. The next prime is 102406021687. The reversal of 102406021646 is 646120604201.

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

It is a super-2 number, since 2×102406021646² (a number of 23 digits) contains 22 as substring.

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, 73778861 + ... + 73780248.

It is an arithmetic number, because the mean of its divisors is an integer number (19256463855).

Almost surely, 2^102406021646 is an apocalyptic number.

102406021646 is a deficient number, since it is larger than the sum of its proper divisors (51645689194).

102406021646 is a wasteful number, since it uses less digits than its factorization.

102406021646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147559458.

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 102406021646 its reverse (646120604201), we get a palindrome (748526625847).

The spelling of 102406021646 in words is "one hundred two billion, four hundred six million, twenty-one thousand, six hundred forty-six".