2157346015609 has 2 divisors, whose sum is σ = 2157346015610. Its totient is φ = 2157346015608.

The previous prime is 2157346015567. The next prime is 2157346015673. The reversal of 2157346015609 is 9065106437512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2036100686400 + 121245329209 = 1426920^2 + 348203^2 .

It is a cyclic number.

It is not a de Polignac number, because 2157346015609 - 2²⁵ = 2157312461177 is a prime.

It is not a weakly prime, because it can be changed into another prime (2157346615609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078673007804 + 1078673007805.

It is an arithmetic number, because the mean of its divisors is an integer number (1078673007805).

Almost surely, 2^{2157346015609} is an apocalyptic number.

It is an amenable number.

2157346015609 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157346015609 is an equidigital number, since it uses as much as digits as its factorization.

2157346015609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1360800, while the sum is 49.

The spelling of 2157346015609 in words is "two trillion, one hundred fifty-seven billion, three hundred forty-six million, fifteen thousand, six hundred nine".