40518131577378 has 256 divisors, whose sum is σ = 102327500620800. Its totient is φ = 10413121536000.

The previous prime is 40518131577317. The next prime is 40518131577403. The reversal of 40518131577378 is 87377513181504.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 968177398 + ... + 968219246.

It is an arithmetic number, because the mean of its divisors is an integer number (399716799300).

Almost surely, 2^{40518131577378} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40518131577378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51163750310400).

40518131577378 is an abundant number, since it is smaller than the sum of its proper divisors (61809369043422).

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

40518131577378 is a wasteful number, since it uses less digits than its factorization.

40518131577378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42253.

The product of its (nonzero) digits is 19756800, while the sum is 60.

The spelling of 40518131577378 in words is "forty trillion, five hundred eighteen billion, one hundred thirty-one million, five hundred seventy-seven thousand, three hundred seventy-eight".