145413603661 has 2 divisors, whose sum is σ = 145413603662. Its totient is φ = 145413603660.

The previous prime is 145413603649. The next prime is 145413603677. The reversal of 145413603661 is 166306314541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107859039561 + 37554564100 = 328419^2 + 193790^2 .

It is a cyclic number.

It is not a de Polignac number, because 145413603661 - 2⁹ = 145413603149 is a prime.

It is a super-2 number, since 2×145413603661² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145413603611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72706801830 + 72706801831.

It is an arithmetic number, because the mean of its divisors is an integer number (72706801831).

Almost surely, 2^145413603661 is an apocalyptic number.

It is an amenable number.

145413603661 is a deficient number, since it is larger than the sum of its proper divisors (1).

145413603661 is an equidigital number, since it uses as much as digits as its factorization.

145413603661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 145413603661 in words is "one hundred forty-five billion, four hundred thirteen million, six hundred three thousand, six hundred sixty-one".