1945012892161 has 32 divisors (see below), whose sum is σ = 2001895354368. Its totient is φ = 1889278110720.

The previous prime is 1945012892083. The next prime is 1945012892201. The reversal of 1945012892161 is 1612982105491.

It is a cyclic number.

It is not a de Polignac number, because 1945012892161 - 2¹³ = 1945012883969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1945012892861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 597177645 + ... + 597180901.

It is an arithmetic number, because the mean of its divisors is an integer number (62559229824).

Almost surely, 2^{1945012892161} is an apocalyptic number.

It is an amenable number.

1945012892161 is a deficient number, since it is larger than the sum of its proper divisors (56882462207).

1945012892161 is a wasteful number, since it uses less digits than its factorization.

1945012892161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3961.

The product of its (nonzero) digits is 311040, while the sum is 49.

The spelling of 1945012892161 in words is "one trillion, nine hundred forty-five billion, twelve million, eight hundred ninety-two thousand, one hundred sixty-one".