40194981613138 has 8 divisors (see below), whose sum is σ = 65773606276080. Its totient is φ = 18270446187780.

The previous prime is 40194981613123. The next prime is 40194981613139. The reversal of 40194981613138 is 83131618949104.

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

It is not an unprimeable number, because it can be changed into a prime (40194981613139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913522309368 + ... + 913522309411.

It is an arithmetic number, because the mean of its divisors is an integer number (8221700784510).

Almost surely, 2^{40194981613138} is an apocalyptic number.

40194981613138 is a deficient number, since it is larger than the sum of its proper divisors (25578624662942).

40194981613138 is a wasteful number, since it uses less digits than its factorization.

40194981613138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827044618792.

The product of its (nonzero) digits is 4478976, while the sum is 58.

The spelling of 40194981613138 in words is "forty trillion, one hundred ninety-four billion, nine hundred eighty-one million, six hundred thirteen thousand, one hundred thirty-eight".