145957722661 has 2 divisors, whose sum is σ = 145957722662. Its totient is φ = 145957722660.

The previous prime is 145957722601. The next prime is 145957722731. The reversal of 145957722661 is 166227759541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83192441761 + 62765280900 = 288431^2 + 250530^2 .

It is a cyclic number.

It is not a de Polignac number, because 145957722661 - 2³³ = 137367788069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145957722601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72978861330 + 72978861331.

It is an arithmetic number, because the mean of its divisors is an integer number (72978861331).

Almost surely, 2^145957722661 is an apocalyptic number.

It is an amenable number.

145957722661 is a deficient number, since it is larger than the sum of its proper divisors (1).

145957722661 is an equidigital number, since it uses as much as digits as its factorization.

145957722661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6350400, while the sum is 55.

The spelling of 145957722661 in words is "one hundred forty-five billion, nine hundred fifty-seven million, seven hundred twenty-two thousand, six hundred sixty-one".