40738157979 has 4 divisors (see below), whose sum is σ = 54317543976. Its totient is φ = 27158771984.

The previous prime is 40738157959. The next prime is 40738157987. The reversal of 40738157979 is 97975183704.

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 40738157979 - 2¹³ = 40738149787 is a prime.

It is a super-2 number, since 2×40738157979² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40738157959) 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, 6789692994 + ... + 6789692999.

It is an arithmetic number, because the mean of its divisors is an integer number (13579385994).

Almost surely, 2^40738157979 is an apocalyptic number.

40738157979 is a deficient number, since it is larger than the sum of its proper divisors (13579385997).

40738157979 is a wasteful number, since it uses less digits than its factorization.

40738157979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13579385996.

The product of its (nonzero) digits is 13335840, while the sum is 60.

The spelling of 40738157979 in words is "forty billion, seven hundred thirty-eight million, one hundred fifty-seven thousand, nine hundred seventy-nine".