68749232081461 has 4 divisors (see below), whose sum is σ = 70607319435052. Its totient is φ = 66891144727872.

The previous prime is 68749232081419. The next prime is 68749232081479. The reversal of 68749232081461 is 16418023294786.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30021698390436 + 38727533691025 = 5479206^2 + 6223145^2 .

It is a cyclic number.

It is not a de Polignac number, because 68749232081461 - 2³⁷ = 68611793127989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68749232081461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68749272081461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 929043676740 + ... + 929043676813.

It is an arithmetic number, because the mean of its divisors is an integer number (17651829858763).

Almost surely, 2^{68749232081461} is an apocalyptic number.

It is an amenable number.

68749232081461 is a deficient number, since it is larger than the sum of its proper divisors (1858087353591).

68749232081461 is a wasteful number, since it uses less digits than its factorization.

68749232081461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1858087353590.

The product of its (nonzero) digits is 27869184, while the sum is 61.

The spelling of 68749232081461 in words is "sixty-eight trillion, seven hundred forty-nine billion, two hundred thirty-two million, eighty-one thousand, four hundred sixty-one".