77561153 has 2 divisors, whose sum is σ = 77561154. Its totient is φ = 77561152.

The previous prime is 77561147. The next prime is 77561177. The reversal of 77561153 is 35116577.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67108864 + 10452289 = 8192^2 + 3233^2 .

It is a cyclic number.

It is not a de Polignac number, because 77561153 - 2¹² = 77557057 is a prime.

It is not a weakly prime, because it can be changed into another prime (77561353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38780576 + 38780577.

It is an arithmetic number, because the mean of its divisors is an integer number (38780577).

Almost surely, 2^77561153 is an apocalyptic number.

It is an amenable number.

77561153 is a deficient number, since it is larger than the sum of its proper divisors (1).

77561153 is an equidigital number, since it uses as much as digits as its factorization.

77561153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22050, while the sum is 35.

The square root of 77561153 is about 8806.8810029431. The cubic root of 77561153 is about 426.4630600668.

The spelling of 77561153 in words is "seventy-seven million, five hundred sixty-one thousand, one hundred fifty-three".