15101016061661 has 2 divisors, whose sum is σ = 15101016061662. Its totient is φ = 15101016061660.

The previous prime is 15101016061639. The next prime is 15101016061669. The reversal of 15101016061661 is 16616061010151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8791906963225 + 6309109098436 = 2965115^2 + 2511794^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15101016061661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15101016061669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7550508030830 + 7550508030831.

It is an arithmetic number, because the mean of its divisors is an integer number (7550508030831).

Almost surely, 2^{15101016061661} is an apocalyptic number.

It is an amenable number.

15101016061661 is a deficient number, since it is larger than the sum of its proper divisors (1).

15101016061661 is an equidigital number, since it uses as much as digits as its factorization.

15101016061661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 35.

The spelling of 15101016061661 in words is "fifteen trillion, one hundred one billion, sixteen million, sixty-one thousand, six hundred sixty-one".