1920520107765 has 48 divisors (see below), whose sum is σ = 4028250590208. Its totient is φ = 826307808768.

The previous prime is 1920520107763. The next prime is 1920520107827. The reversal of 1920520107765 is 5677010250291.

1920520107765 is a `hidden beast` number, since 19 + 2 + 0 + 520 + 107 + 7 + 6 + 5 = 666.

It is not a de Polignac number, because 1920520107765 - 2¹ = 1920520107763 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1920520107765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920520107763) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 179314917 + ... + 179325626.

It is an arithmetic number, because the mean of its divisors is an integer number (83921887296).

Almost surely, 2^{1920520107765} is an apocalyptic number.

1920520107765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1920520107765 is an abundant number, since it is smaller than the sum of its proper divisors (2107730482443).

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

1920520107765 is a wasteful number, since it uses less digits than its factorization.

1920520107765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358640578 (or 358640575 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 45.

The spelling of 1920520107765 in words is "one trillion, nine hundred twenty billion, five hundred twenty million, one hundred seven thousand, seven hundred sixty-five".