145805739746 has 4 divisors (see below), whose sum is σ = 218708609622. Its totient is φ = 72902869872.

The previous prime is 145805739727. The next prime is 145805739749. The reversal of 145805739746 is 647937508541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 647937508541 = 14747 ⋅43936903.

It can be written as a sum of positive squares in only one way, i.e., 126870603721 + 18935136025 = 356189^2 + 137605^2 .

It is not an unprimeable number, because it can be changed into a prime (145805739749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36451434935 + ... + 36451434938.

Almost surely, 2^145805739746 is an apocalyptic number.

145805739746 is a deficient number, since it is larger than the sum of its proper divisors (72902869876).

145805739746 is an equidigital number, since it uses as much as digits as its factorization.

145805739746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72902869875.

The product of its (nonzero) digits is 25401600, while the sum is 59.

The spelling of 145805739746 in words is "one hundred forty-five billion, eight hundred five million, seven hundred thirty-nine thousand, seven hundred forty-six".