40345542018 has 32 divisors (see below), whose sum is σ = 89739371520. Its totient is φ = 13436122320.

The previous prime is 40345541981. The next prime is 40345542067. The reversal of 40345542018 is 81024554304.

It is a happy number.

40345542018 is a `hidden beast` number, since 40 + 34 + 554 + 20 + 18 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284973 + ... + 402368.

It is an arithmetic number, because the mean of its divisors is an integer number (2804355360).

Almost surely, 2^40345542018 is an apocalyptic number.

40345542018 is an abundant number, since it is smaller than the sum of its proper divisors (49393829502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40345542018 is a wasteful number, since it uses less digits than its factorization.

40345542018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688439 (or 688433 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The spelling of 40345542018 in words is "forty billion, three hundred forty-five million, five hundred forty-two thousand, eighteen".