40017018557 has 8 divisors (see below), whose sum is σ = 40132485120. Its totient is φ = 39901617360.

The previous prime is 40017018553. The next prime is 40017018571. The reversal of 40017018557 is 75581071004.

It is a happy number.

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 40017018557 - 2² = 40017018553 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 40017018557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40017018553) 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, 1379432 + ... + 1408142.

It is an arithmetic number, because the mean of its divisors is an integer number (5016560640).

Almost surely, 2^40017018557 is an apocalyptic number.

It is an amenable number.

40017018557 is a deficient number, since it is larger than the sum of its proper divisors (115466563).

40017018557 is a wasteful number, since it uses less digits than its factorization.

40017018557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32683.

The product of its (nonzero) digits is 39200, while the sum is 38.

The spelling of 40017018557 in words is "forty billion, seventeen million, eighteen thousand, five hundred fifty-seven".