40126541637638 has 8 divisors (see below), whose sum is σ = 63730389659832. Its totient is φ = 18883078417696.

The previous prime is 40126541637631. The next prime is 40126541637643. The reversal of 40126541637638 is 83673614562104.

It is a happy number.

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

It is a super-2 number, since 2×40126541637638² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40126541637631) 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, 590096200520 + ... + 590096200587.

It is an arithmetic number, because the mean of its divisors is an integer number (7966298707479).

Almost surely, 2^{40126541637638} is an apocalyptic number.

40126541637638 is a deficient number, since it is larger than the sum of its proper divisors (23603848022194).

40126541637638 is a wasteful number, since it uses less digits than its factorization.

40126541637638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180192401126.

The product of its (nonzero) digits is 17418240, while the sum is 56.

The spelling of 40126541637638 in words is "forty trillion, one hundred twenty-six billion, five hundred forty-one million, six hundred thirty-seven thousand, six hundred thirty-eight".