1861790692097 has 16 divisors (see below), whose sum is σ = 2143518716160. Its totient is φ = 1584004616448.

The previous prime is 1861790692057. The next prime is 1861790692147. The reversal of 1861790692097 is 7902960971681.

It is a cyclic number.

It is not a de Polignac number, because 1861790692097 - 2⁶ = 1861790692033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1861790692037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9424148 + ... + 9619674.

It is an arithmetic number, because the mean of its divisors is an integer number (133969919760).

Almost surely, 2^{1861790692097} is an apocalyptic number.

It is an amenable number.

1861790692097 is a deficient number, since it is larger than the sum of its proper divisors (281728024063).

1861790692097 is a wasteful number, since it uses less digits than its factorization.

1861790692097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205600.

The product of its (nonzero) digits is 20575296, while the sum is 65.

The spelling of 1861790692097 in words is "one trillion, eight hundred sixty-one billion, seven hundred ninety million, six hundred ninety-two thousand, ninety-seven".