147634668657661 has 2 divisors, whose sum is σ = 147634668657662. Its totient is φ = 147634668657660.

The previous prime is 147634668657607. The next prime is 147634668657667. The reversal of 147634668657661 is 166756866436741.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113107351417636 + 34527317240025 = 10635194^2 + 5875995^2 .

It is a cyclic number.

It is not a de Polignac number, because 147634668657661 - 2⁹ = 147634668657149 is a prime.

It is a super-3 number, since 3×147634668657661³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147634668657667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73817334328830 + 73817334328831.

It is an arithmetic number, because the mean of its divisors is an integer number (73817334328831).

Almost surely, 2^{147634668657661} is an apocalyptic number.

It is an amenable number.

147634668657661 is a deficient number, since it is larger than the sum of its proper divisors (1).

147634668657661 is an equidigital number, since it uses as much as digits as its factorization.

147634668657661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4389396480, while the sum is 76.

The spelling of 147634668657661 in words is "one hundred forty-seven trillion, six hundred thirty-four billion, six hundred sixty-eight million, six hundred fifty-seven thousand, six hundred sixty-one".