2051537344645 has 4 divisors (see below), whose sum is σ = 2461844813580. Its totient is φ = 1641229875712.

The previous prime is 2051537344631. The next prime is 2051537344667. The reversal of 2051537344645 is 5464437351502.

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 1512944280324 + 538593064321 = 1230018^2 + 733889^2 .

It is a cyclic number.

It is not a de Polignac number, because 2051537344645 - 2⁷ = 2051537344517 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205153734460 + ... + 205153734469.

It is an arithmetic number, because the mean of its divisors is an integer number (615461203395).

Almost surely, 2^{2051537344645} is an apocalyptic number.

It is an amenable number.

2051537344645 is a deficient number, since it is larger than the sum of its proper divisors (410307468935).

2051537344645 is an equidigital number, since it uses as much as digits as its factorization.

2051537344645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410307468934.

The product of its (nonzero) digits is 6048000, while the sum is 49.

The spelling of 2051537344645 in words is "two trillion, fifty-one billion, five hundred thirty-seven million, three hundred forty-four thousand, six hundred forty-five".