1940164458418 has 4 divisors (see below), whose sum is σ = 2910246687630. Its totient is φ = 970082229208.

The previous prime is 1940164458413. The next prime is 1940164458461. The reversal of 1940164458418 is 8148544610491.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1244213086249 + 695951372169 = 1115443^2 + 834237^2 .

It is a super-2 number, since 2×1940164458418² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1940164458413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485041114603 + ... + 485041114606.

Almost surely, 2^{1940164458418} is an apocalyptic number.

1940164458418 is a deficient number, since it is larger than the sum of its proper divisors (970082229212).

1940164458418 is an equidigital number, since it uses as much as digits as its factorization.

1940164458418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970082229211.

The product of its (nonzero) digits is 4423680, while the sum is 55.

The spelling of 1940164458418 in words is "one trillion, nine hundred forty billion, one hundred sixty-four million, four hundred fifty-eight thousand, four hundred eighteen".