40018367640 has 32 divisors (see below), whose sum is σ = 120055103280. Its totient is φ = 10671564672.

The previous prime is 40018367629. The next prime is 40018367689. The reversal of 40018367640 is 4676381004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166743079 + ... + 166743318.

Almost surely, 2^40018367640 is an apocalyptic number.

40018367640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40018367640 is an abundant number, since it is smaller than the sum of its proper divisors (80036735640).

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

40018367640 is a wasteful number, since it uses less digits than its factorization.

40018367640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333486411 (or 333486407 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The spelling of 40018367640 in words is "forty billion, eighteen million, three hundred sixty-seven thousand, six hundred forty".