1951061851200 has 504 divisors, whose sum is σ = 8123124667104. Its totient is φ = 405414912000.

The previous prime is 1951061851159. The next prime is 1951061851223. The reversal of 1951061851200 is 21581601591.

It is a happy number.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2210140 + ... + 2964260.

Almost surely, 2^{1951061851200} is an apocalyptic number.

1951061851200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1951061851200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4061562333552).

1951061851200 is an abundant number, since it is smaller than the sum of its proper divisors (6172062815904).

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

1951061851200 is a wasteful number, since it uses less digits than its factorization.

1951061851200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754171 (or 754149 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 39.

The spelling of 1951061851200 in words is "one trillion, nine hundred fifty-one billion, sixty-one million, eight hundred fifty-one thousand, two hundred".