40556291979 has 8 divisors (see below), whose sum is σ = 61800064000. Its totient is φ = 23175023976.

The previous prime is 40556291959. The next prime is 40556292001. The reversal of 40556291979 is 97919265504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40556291979 - 2⁵ = 40556291947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40556291959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 965625979 + ... + 965626020.

It is an arithmetic number, because the mean of its divisors is an integer number (7725008000).

Almost surely, 2^40556291979 is an apocalyptic number.

40556291979 is a deficient number, since it is larger than the sum of its proper divisors (21243772021).

40556291979 is a wasteful number, since it uses less digits than its factorization.

40556291979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1931252009.

The product of its (nonzero) digits is 6123600, while the sum is 57.

The spelling of 40556291979 in words is "forty billion, five hundred fifty-six million, two hundred ninety-one thousand, nine hundred seventy-nine".