1561707151 has 2 divisors, whose sum is σ = 1561707152. Its totient is φ = 1561707150.

The previous prime is 1561707089. The next prime is 1561707163. The reversal of 1561707151 is 1517071651.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1561707151 - 2¹³ = 1561698959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1561507151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 780853575 + 780853576.

It is an arithmetic number, because the mean of its divisors is an integer number (780853576).

Almost surely, 2^1561707151 is an apocalyptic number.

1561707151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1561707151 is an equidigital number, since it uses as much as digits as its factorization.

1561707151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7350, while the sum is 34.

The square root of 1561707151 is about 39518.4406448433. The cubic root of 1561707151 is about 1160.2009043129.

The spelling of 1561707151 in words is "one billion, five hundred sixty-one million, seven hundred seven thousand, one hundred fifty-one".