1216814279190 has 16 divisors (see below), whose sum is σ = 2920354270128. Its totient is φ = 324483807776.

The previous prime is 1216814279137. The next prime is 1216814279201. The reversal of 1216814279190 is 919724186121.

It is a super-2 number, since 2×1216814279190² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 20280237957 + ... + 20280238016.

It is an arithmetic number, because the mean of its divisors is an integer number (182522141883).

Almost surely, 2^{1216814279190} is an apocalyptic number.

1216814279190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216814279190 is an abundant number, since it is smaller than the sum of its proper divisors (1703539990938).

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

1216814279190 is a wasteful number, since it uses less digits than its factorization.

1216814279190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40560475983.

The product of its (nonzero) digits is 435456, while the sum is 51.

The spelling of 1216814279190 in words is "one trillion, two hundred sixteen billion, eight hundred fourteen million, two hundred seventy-nine thousand, one hundred ninety".