1051565353920 has 392 divisors, whose sum is σ = 3758790887280. Its totient is φ = 280085299200.

The previous prime is 1051565353919. The next prime is 1051565353921. The reversal of 1051565353920 is 293535651501.

1051565353920 is a `hidden beast` number, since 1 + 0 + 5 + 1 + 565 + 35 + 39 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (1051565353919) and next prime (1051565353921).

It is a super-2 number, since 2×1051565353920² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051565353921) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 245175136 + ... + 245179424.

Almost surely, 2^{1051565353920} is an apocalyptic number.

1051565353920 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 1051565353920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1879395443640).

1051565353920 is an abundant number, since it is smaller than the sum of its proper divisors (2707225533360).

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

1051565353920 is an equidigital number, since it uses as much as digits as its factorization.

1051565353920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5375 (or 5350 counting only the distinct ones).

The product of its (nonzero) digits is 607500, while the sum is 45.

The spelling of 1051565353920 in words is "one trillion, fifty-one billion, five hundred sixty-five million, three hundred fifty-three thousand, nine hundred twenty".