1164667573661 has 4 divisors (see below), whose sum is σ = 1202237495424. Its totient is φ = 1127097651900.

The previous prime is 1164667573651. The next prime is 1164667573679. The reversal of 1164667573661 is 1663757664611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1164667573661 - 2³⁴ = 1147487704477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1164667573661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1164667573621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18784960835 + ... + 18784960896.

It is an arithmetic number, because the mean of its divisors is an integer number (300559373856).

Almost surely, 2^{1164667573661} is an apocalyptic number.

It is an amenable number.

1164667573661 is a deficient number, since it is larger than the sum of its proper divisors (37569921763).

1164667573661 is an equidigital number, since it uses as much as digits as its factorization.

1164667573661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37569921762.

The product of its digits is 22861440, while the sum is 59.

The spelling of 1164667573661 in words is "one trillion, one hundred sixty-four billion, six hundred sixty-seven million, five hundred seventy-three thousand, six hundred sixty-one".