68980002749 has 16 divisors (see below), whose sum is σ = 81485024256. Its totient is φ = 57142713600.

The previous prime is 68980002733. The next prime is 68980002769. The reversal of 68980002749 is 94720008986.

It is not a de Polignac number, because 68980002749 - 2⁴ = 68980002733 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 68980002749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68980002709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45692 + ... + 374229.

It is an arithmetic number, because the mean of its divisors is an integer number (5092814016).

Almost surely, 2^68980002749 is an apocalyptic number.

It is an amenable number.

68980002749 is a deficient number, since it is larger than the sum of its proper divisors (12505021507).

68980002749 is a wasteful number, since it uses less digits than its factorization.

68980002749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420716.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The spelling of 68980002749 in words is "sixty-eight billion, nine hundred eighty million, two thousand, seven hundred forty-nine".