940531137638 has 4 divisors (see below), whose sum is σ = 1410796706460. Its totient is φ = 470265568818.

The previous prime is 940531137617. The next prime is 940531137653. The reversal of 940531137638 is 836731135049.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 836731135049 = 1427 ⋅586356787.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 235132784408 + ... + 235132784411.

It is an arithmetic number, because the mean of its divisors is an integer number (352699176615).

Almost surely, 2^940531137638 is an apocalyptic number.

940531137638 is a deficient number, since it is larger than the sum of its proper divisors (470265568822).

940531137638 is a wasteful number, since it uses less digits than its factorization.

940531137638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470265568821.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 940531137638 in words is "nine hundred forty billion, five hundred thirty-one million, one hundred thirty-seven thousand, six hundred thirty-eight".