40397021759 has 4 divisors (see below), whose sum is σ = 40425898800. Its totient is φ = 40368144720.

The previous prime is 40397021737. The next prime is 40397021767. The reversal of 40397021759 is 95712079304.

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

It is a cyclic number.

It is not a de Polignac number, because 40397021759 - 2⁸ = 40397021503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40397021719) 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, 14436422 + ... + 14439219.

It is an arithmetic number, because the mean of its divisors is an integer number (10106474700).

Almost surely, 2^40397021759 is an apocalyptic number.

40397021759 is a deficient number, since it is larger than the sum of its proper divisors (28877041).

40397021759 is a wasteful number, since it uses less digits than its factorization.

40397021759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28877040.

The product of its (nonzero) digits is 476280, while the sum is 47.

The spelling of 40397021759 in words is "forty billion, three hundred ninety-seven million, twenty-one thousand, seven hundred fifty-nine".