145313206644661 has 32 divisors (see below), whose sum is σ = 161593131168000. Its totient is φ = 129547334292480.

The previous prime is 145313206644559. The next prime is 145313206644679. The reversal of 145313206644661 is 166446602313541.

It is a cyclic number.

It is not a de Polignac number, because 145313206644661 - 2⁹ = 145313206644149 is a prime.

It is a super-2 number, since 2×145313206644661² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145313206644599 and 145313206644608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145313206648661) 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, 19279975885 + ... + 19279983421.

It is an arithmetic number, because the mean of its divisors is an integer number (5049785349000).

Almost surely, 2^{145313206644661} is an apocalyptic number.

145313206644661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

145313206644661 is a deficient number, since it is larger than the sum of its proper divisors (16279924523339).

145313206644661 is a wasteful number, since it uses less digits than its factorization.

145313206644661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19309.

The product of its (nonzero) digits is 7464960, while the sum is 52.

The spelling of 145313206644661 in words is "one hundred forty-five trillion, three hundred thirteen billion, two hundred six million, six hundred forty-four thousand, six hundred sixty-one".