1611247391412 has 12 divisors (see below), whose sum is σ = 3759577246656. Its totient is φ = 537082463800.

The previous prime is 1611247391363. The next prime is 1611247391419. The reversal of 1611247391412 is 2141937421161.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1611247391412² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611247391419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67135307964 + ... + 67135307987.

It is an arithmetic number, because the mean of its divisors is an integer number (313298103888).

Almost surely, 2^{1611247391412} is an apocalyptic number.

1611247391412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1611247391412 is an abundant number, since it is smaller than the sum of its proper divisors (2148329855244).

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

1611247391412 is a wasteful number, since it uses less digits than its factorization.

1611247391412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134270615958 (or 134270615956 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The spelling of 1611247391412 in words is "one trillion, six hundred eleven billion, two hundred forty-seven million, three hundred ninety-one thousand, four hundred twelve".