194181500642740 has 48 divisors (see below), whose sum is σ = 451017822305232. Its totient is φ = 69760006880256.

The previous prime is 194181500642719. The next prime is 194181500642749. The reversal of 194181500642740 is 47246005181491.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 6949951148176 + 187231549494564 = 2636276^2 + 13683258^2 .

It is a super-2 number, since 2×194181500642740² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194181500642749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10092583969 + ... + 10092603208.

It is an arithmetic number, because the mean of its divisors is an integer number (9396204631359).

Almost surely, 2^{194181500642740} is an apocalyptic number.

194181500642740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

194181500642740 is an abundant number, since it is smaller than the sum of its proper divisors (256836321662492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

194181500642740 is a wasteful number, since it uses less digits than its factorization.

194181500642740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20185187236 (or 20185187234 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 194181500642740 in words is "one hundred ninety-four trillion, one hundred eighty-one billion, five hundred million, six hundred forty-two thousand, seven hundred forty".