2087312003657 has 4 divisors (see below), whose sum is σ = 2087641811220. Its totient is φ = 2086982196096.

The previous prime is 2087312003573. The next prime is 2087312003717. The reversal of 2087312003657 is 7563002137802.

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 662239515961 + 1425072487696 = 813781^2 + 1193764^2 .

It is a cyclic number.

It is not a de Polignac number, because 2087312003657 - 2²⁶ = 2087244894793 is a prime.

It is a super-2 number, since 2×2087312003657² (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 (2087312008657) 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, 164894288 + ... + 164906945.

It is an arithmetic number, because the mean of its divisors is an integer number (521910452805).

Almost surely, 2^{2087312003657} is an apocalyptic number.

It is an amenable number.

2087312003657 is a deficient number, since it is larger than the sum of its proper divisors (329807563).

2087312003657 is an equidigital number, since it uses as much as digits as its factorization.

2087312003657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329807562.

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 2087312003657 in words is "two trillion, eighty-seven billion, three hundred twelve million, three thousand, six hundred fifty-seven".