75721142066102 has 64 divisors (see below), whose sum is σ = 125497782079488. Its totient is φ = 34047025488000.

The previous prime is 75721142066071. The next prime is 75721142066131. The reversal of 75721142066102 is 20166024112757.

It is a happy number.

It is a super-2 number, since 2×75721142066102² (a number of 29 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 31 ways as a sum of consecutive naturals, for example, 361192952 + ... + 361402532.

It is an arithmetic number, because the mean of its divisors is an integer number (1960902844992).

Almost surely, 2^{75721142066102} is an apocalyptic number.

75721142066102 is a deficient number, since it is larger than the sum of its proper divisors (49776640013386).

75721142066102 is a wasteful number, since it uses less digits than its factorization.

75721142066102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211005.

The product of its (nonzero) digits is 282240, while the sum is 44.

Adding to 75721142066102 its reverse (20166024112757), we get a palindrome (95887166178859).

The spelling of 75721142066102 in words is "seventy-five trillion, seven hundred twenty-one billion, one hundred forty-two million, sixty-six thousand, one hundred two".