940640057956 has 27 divisors (see below), whose sum is σ = 1701042415443. Its totient is φ = 455119319160.

The previous prime is 940640057939. The next prime is 940640057957. The reversal of 940640057956 is 659750046049.

It is a happy number.

The square root of 940640057956 is 969866.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 940640057897 and 940640057906.

It is not an unprimeable number, because it can be changed into a prime (940640057957) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 60123871 + ... + 60139513.

Almost surely, 2^940640057956 is an apocalyptic number.

940640057956 is the 969866-th square number.

It is an amenable number.

940640057956 is a deficient number, since it is larger than the sum of its proper divisors (760402357487).

940640057956 is an frugal number, since it uses more digits than its factorization.

940640057956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31352 (or 15676 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 55.

The spelling of 940640057956 in words is "nine hundred forty billion, six hundred forty million, fifty-seven thousand, nine hundred fifty-six".