1977551153 has 2 divisors, whose sum is σ = 1977551154. Its totient is φ = 1977551152.

The previous prime is 1977551113. The next prime is 1977551243. The reversal of 1977551153 is 3511557791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1044065344 + 933485809 = 32312^2 + 30553^2 .

It is a cyclic number.

It is not a de Polignac number, because 1977551153 - 2¹⁰ = 1977550129 is a prime.

It is not a weakly prime, because it can be changed into another prime (1977551113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 988775576 + 988775577.

It is an arithmetic number, because the mean of its divisors is an integer number (988775577).

Almost surely, 2^1977551153 is an apocalyptic number.

It is an amenable number.

1977551153 is a deficient number, since it is larger than the sum of its proper divisors (1).

1977551153 is an equidigital number, since it uses as much as digits as its factorization.

1977551153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165375, while the sum is 44.

The square root of 1977551153 is about 44469.6655373076. The cubic root of 1977551153 is about 1255.1893394327.

The spelling of 1977551153 in words is "one billion, nine hundred seventy-seven million, five hundred fifty-one thousand, one hundred fifty-three".