1920996034561 has 4 divisors (see below), whose sum is σ = 1921000460224. Its totient is φ = 1920991608900.

The previous prime is 1920996034513. The next prime is 1920996034603. The reversal of 1920996034561 is 1654306990291.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1920996034561 - 2²³ = 1920987645953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1920996004561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1481085 + ... + 2456746.

It is an arithmetic number, because the mean of its divisors is an integer number (480250115056).

Almost surely, 2^{1920996034561} is an apocalyptic number.

It is an amenable number.

1920996034561 is a deficient number, since it is larger than the sum of its proper divisors (4425663).

1920996034561 is an equidigital number, since it uses as much as digits as its factorization.

1920996034561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4425662.

The product of its (nonzero) digits is 3149280, while the sum is 55.

The spelling of 1920996034561 in words is "one trillion, nine hundred twenty billion, nine hundred ninety-six million, thirty-four thousand, five hundred sixty-one".