1861411271512 has 64 divisors (see below), whose sum is σ = 3774066912000. Its totient is φ = 855588524544.

The previous prime is 1861411271507. The next prime is 1861411271513. The reversal of 1861411271512 is 2151721141681.

It is a super-2 number, since 2×1861411271512² (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 (1861411271513) 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, 27469689 + ... + 27537367.

It is an arithmetic number, because the mean of its divisors is an integer number (58969795500).

Almost surely, 2^{1861411271512} is an apocalyptic number.

It is an amenable number.

1861411271512 is an abundant number, since it is smaller than the sum of its proper divisors (1912655640488).

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

1861411271512 is a wasteful number, since it uses less digits than its factorization.

1861411271512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68780 (or 68776 counting only the distinct ones).

The product of its digits is 26880, while the sum is 40.

The spelling of 1861411271512 in words is "one trillion, eight hundred sixty-one billion, four hundred eleven million, two hundred seventy-one thousand, five hundred twelve".