145761991541 has 2 divisors, whose sum is σ = 145761991542. Its totient is φ = 145761991540.

The previous prime is 145761991517. The next prime is 145761991547. The reversal of 145761991541 is 145199167541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139689062500 + 6072929041 = 373750^2 + 77929^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145761991541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145761991547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72880995770 + 72880995771.

It is an arithmetic number, because the mean of its divisors is an integer number (72880995771).

Almost surely, 2^145761991541 is an apocalyptic number.

It is an amenable number.

145761991541 is a deficient number, since it is larger than the sum of its proper divisors (1).

145761991541 is an equidigital number, since it uses as much as digits as its factorization.

145761991541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1360800, while the sum is 53.

The spelling of 145761991541 in words is "one hundred forty-five billion, seven hundred sixty-one million, nine hundred ninety-one thousand, five hundred forty-one".