1278190440190 has 64 divisors (see below), whose sum is σ = 2370916396800. Its totient is φ = 495839232000.

The previous prime is 1278190440187. The next prime is 1278190440229. The reversal of 1278190440190 is 910440918721.

It is a super-2 number, since 2×1278190440190² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1278190440190.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49875580 + ... + 49901200.

It is an arithmetic number, because the mean of its divisors is an integer number (37045568700).

Almost surely, 2^{1278190440190} is an apocalyptic number.

1278190440190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1278190440190 is a deficient number, since it is larger than the sum of its proper divisors (1092725956610).

1278190440190 is a wasteful number, since it uses less digits than its factorization.

1278190440190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26389.

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 1278190440190 in words is "one trillion, two hundred seventy-eight billion, one hundred ninety million, four hundred forty thousand, one hundred ninety".