147743764681 has 4 divisors (see below), whose sum is σ = 148162302612. Its totient is φ = 147325226752.

The previous prime is 147743764579. The next prime is 147743764687. The reversal of 147743764681 is 186467347741.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44728443081 + 103015321600 = 211491^2 + 320960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-147743764681 is a prime.

It is a super-2 number, since 2×147743764681² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147743764687) 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, 209268436 + ... + 209269141.

It is an arithmetic number, because the mean of its divisors is an integer number (37040575653).

Almost surely, 2^147743764681 is an apocalyptic number.

It is an amenable number.

147743764681 is a deficient number, since it is larger than the sum of its proper divisors (418537931).

147743764681 is an equidigital number, since it uses as much as digits as its factorization.

147743764681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418537930.

The product of its digits is 18966528, while the sum is 58.

The spelling of 147743764681 in words is "one hundred forty-seven billion, seven hundred forty-three million, seven hundred sixty-four thousand, six hundred eighty-one".