1151661631 has 2 divisors, whose sum is σ = 1151661632. Its totient is φ = 1151661630.

The previous prime is 1151661629. The next prime is 1151661653. The reversal of 1151661631 is 1361661511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1151661631 - 2¹ = 1151661629 is a prime.

It is a super-2 number, since 2×1151661631² = 2652649024635160322, which contains 22 as substring.

Together with 1151661629, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1151661593 and 1151661602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1151661671) 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, 575830815 + 575830816.

It is an arithmetic number, because the mean of its divisors is an integer number (575830816).

Almost surely, 2^1151661631 is an apocalyptic number.

1151661631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151661631 is an equidigital number, since it uses as much as digits as its factorization.

1151661631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 31.

The square root of 1151661631 is about 33936.1404847399. The cubic root of 1151661631 is about 1048.1939113316.

The spelling of 1151661631 in words is "one billion, one hundred fifty-one million, six hundred sixty-one thousand, six hundred thirty-one".