1670644245461 has 16 divisors (see below), whose sum is σ = 1744421032368. Its totient is φ = 1598466355200.

The previous prime is 1670644245427. The next prime is 1670644245541. The reversal of 1670644245461 is 1645424460761.

It can be written as a sum of positive squares in 8 ways, for example, as 169553709361 + 1501090536100 = 411769^2 + 1225190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1670644245461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670644244461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5003501 + ... + 5326941.

It is an arithmetic number, because the mean of its divisors is an integer number (109026314523).

Almost surely, 2^{1670644245461} is an apocalyptic number.

It is an amenable number.

1670644245461 is a deficient number, since it is larger than the sum of its proper divisors (73776786907).

1670644245461 is a wasteful number, since it uses less digits than its factorization.

1670644245461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325912.

The product of its (nonzero) digits is 3870720, while the sum is 50.

The spelling of 1670644245461 in words is "one trillion, six hundred seventy billion, six hundred forty-four million, two hundred forty-five thousand, four hundred sixty-one".