1651161157 has 2 divisors, whose sum is σ = 1651161158. Its totient is φ = 1651161156.

The previous prime is 1651161151. The next prime is 1651161167. The reversal of 1651161157 is 7511611561.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1227871681 + 423289476 = 35041^2 + 20574^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1651161157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1651161151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825580578 + 825580579.

It is an arithmetic number, because the mean of its divisors is an integer number (825580579).

Almost surely, 2^1651161157 is an apocalyptic number.

It is an amenable number.

1651161157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1651161157 is an equidigital number, since it uses as much as digits as its factorization.

1651161157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 34.

The square root of 1651161157 is about 40634.4823641203. The cubic root of 1651161157 is about 1181.9428772797.

The spelling of 1651161157 in words is "one billion, six hundred fifty-one million, one hundred sixty-one thousand, one hundred fifty-seven".