1864227500161 has 8 divisors (see below), whose sum is σ = 2025396250920. Its totient is φ = 1705596840192.

The previous prime is 1864227500123. The next prime is 1864227500167. The reversal of 1864227500161 is 1610057224681.

It can be written as a sum of positive squares in 4 ways, for example, as 382456901761 + 1481770598400 = 618431^2 + 1217280^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1864227500161 - 2⁷ = 1864227500033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1864227500167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 634521166 + ... + 634524103.

It is an arithmetic number, because the mean of its divisors is an integer number (253174531365).

Almost surely, 2^{1864227500161} is an apocalyptic number.

It is an amenable number.

1864227500161 is a deficient number, since it is larger than the sum of its proper divisors (161168750759).

1864227500161 is a wasteful number, since it uses less digits than its factorization.

1864227500161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269045395.

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 1864227500161 in words is "one trillion, eight hundred sixty-four billion, two hundred twenty-seven million, five hundred thousand, one hundred sixty-one".