10181401961818 has 16 divisors (see below), whose sum is σ = 16330565528424. Its totient is φ = 4743809881600.

The previous prime is 10181401961789. The next prime is 10181401961827. The reversal of 10181401961818 is 81816910418101.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10177522789729 + 3879172089 = 3190223^2 + 62283^2 .

It is a super-2 number, since 2×10181401961818² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1482437155 + ... + 1482444022.

Almost surely, 2^{10181401961818} is an apocalyptic number.

10181401961818 is a deficient number, since it is larger than the sum of its proper divisors (6149163566606).

10181401961818 is a wasteful number, since it uses less digits than its factorization.

10181401961818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2964881297.

The product of its (nonzero) digits is 110592, while the sum is 49.

The spelling of 10181401961818 in words is "ten trillion, one hundred eighty-one billion, four hundred one million, nine hundred sixty-one thousand, eight hundred eighteen".