1851956563416 has 64 divisors (see below), whose sum is σ = 4693741240320. Its totient is φ = 608807082240.

The previous prime is 1851956563399. The next prime is 1851956563417. The reversal of 1851956563416 is 6143656591581.

It is a happy number.

It is a super-2 number, since 2×1851956563416² (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 1851956563416.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1851956563417) 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, 22157881 + ... + 22241303.

It is an arithmetic number, because the mean of its divisors is an integer number (73339706880).

Almost surely, 2^{1851956563416} is an apocalyptic number.

It is an amenable number.

1851956563416 is an abundant number, since it is smaller than the sum of its proper divisors (2841784676904).

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

1851956563416 is a wasteful number, since it uses less digits than its factorization.

1851956563416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96176 (or 96172 counting only the distinct ones).

The product of its digits is 23328000, while the sum is 60.

The spelling of 1851956563416 in words is "one trillion, eight hundred fifty-one billion, nine hundred fifty-six million, five hundred sixty-three thousand, four hundred sixteen".