1918167742690 has 16 divisors (see below), whose sum is σ = 3536914179960. Its totient is φ = 748553265280.

The previous prime is 1918167742669. The next prime is 1918167742697. The reversal of 1918167742690 is 962477618191.

It can be written as a sum of positive squares in 4 ways, for example, as 1657004839009 + 261162903681 = 1287247^2 + 511041^2 .

It is a super-2 number, since 2×1918167742690² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1918167742697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2339228545 + ... + 2339229364.

Almost surely, 2^{1918167742690} is an apocalyptic number.

1918167742690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1918167742690 is a deficient number, since it is larger than the sum of its proper divisors (1618746437270).

1918167742690 is a wasteful number, since it uses less digits than its factorization.

1918167742690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4678457957.

The product of its (nonzero) digits is 9144576, while the sum is 61.

The spelling of 1918167742690 in words is "one trillion, nine hundred eighteen billion, one hundred sixty-seven million, seven hundred forty-two thousand, six hundred ninety".