1551051165600 has 432 divisors, whose sum is σ = 5712525000000. Its totient is φ = 395260968960.

The previous prime is 1551051165541. The next prime is 1551051165667. The reversal of 1551051165600 is 65611501551.

It is a happy number.

1551051165600 is a `hidden beast` number, since 1 + 551 + 0 + 51 + 1 + 6 + 56 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 206830651 + ... + 206838149.

It is an arithmetic number, because the mean of its divisors is an integer number (13223437500).

Almost surely, 2^{1551051165600} is an apocalyptic number.

1551051165600 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 1551051165600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2856262500000).

1551051165600 is an abundant number, since it is smaller than the sum of its proper divisors (4161473834400).

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

1551051165600 is a wasteful number, since it uses less digits than its factorization.

1551051165600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8797 (or 8781 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 1551051165600 in words is "one trillion, five hundred fifty-one billion, fifty-one million, one hundred sixty-five thousand, six hundred".