2051056694569 has 4 divisors (see below), whose sum is σ = 2072201609044. Its totient is φ = 2029911780096.

The previous prime is 2051056694563. The next prime is 2051056694591. The reversal of 2051056694569 is 9654966501502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 799370105625 + 1251686588944 = 894075^2 + 1118788^2 .

It is not a de Polignac number, because 2051056694569 - 2¹³ = 2051056686377 is a prime.

It is a super-2 number, since 2×2051056694569² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2051056694563) 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, 10572457092 + ... + 10572457285.

It is an arithmetic number, because the mean of its divisors is an integer number (518050402261).

Almost surely, 2^{2051056694569} is an apocalyptic number.

It is an amenable number.

2051056694569 is a deficient number, since it is larger than the sum of its proper divisors (21144914475).

2051056694569 is an equidigital number, since it uses as much as digits as its factorization.

2051056694569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21144914474.

The product of its (nonzero) digits is 17496000, while the sum is 58.

The spelling of 2051056694569 in words is "two trillion, fifty-one billion, fifty-six million, six hundred ninety-four thousand, five hundred sixty-nine".