40557391279 has 8 divisors (see below), whose sum is σ = 42696333680. Its totient is φ = 38418883200.

The previous prime is 40557391267. The next prime is 40557391337. The reversal of 40557391279 is 97219375504.

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

It is a cyclic number.

It is not a de Polignac number, because 40557391279 - 2⁹ = 40557390767 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 (40557392279) 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, 92689 + ... + 299509.

It is an arithmetic number, because the mean of its divisors is an integer number (5337041710).

Almost surely, 2^40557391279 is an apocalyptic number.

40557391279 is a deficient number, since it is larger than the sum of its proper divisors (2138942401).

40557391279 is a wasteful number, since it uses less digits than its factorization.

40557391279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217161.

The product of its (nonzero) digits is 2381400, while the sum is 52.

The spelling of 40557391279 in words is "forty billion, five hundred fifty-seven million, three hundred ninety-one thousand, two hundred seventy-nine".