145461505731 has 4 divisors (see below), whose sum is σ = 193948674312. Its totient is φ = 96974337152.

The previous prime is 145461505729. The next prime is 145461505741. The reversal of 145461505731 is 137505164541.

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

It is a cyclic number.

It is not a de Polignac number, because 145461505731 - 2¹ = 145461505729 is a prime.

It is a super-2 number, since 2×145461505731² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145461505741) 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, 24243584286 + ... + 24243584291.

It is an arithmetic number, because the mean of its divisors is an integer number (48487168578).

Almost surely, 2^145461505731 is an apocalyptic number.

145461505731 is a deficient number, since it is larger than the sum of its proper divisors (48487168581).

145461505731 is an equidigital number, since it uses as much as digits as its factorization.

145461505731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48487168580.

The product of its (nonzero) digits is 252000, while the sum is 42.

The spelling of 145461505731 in words is "one hundred forty-five billion, four hundred sixty-one million, five hundred five thousand, seven hundred thirty-one".