1461509551 has 2 divisors, whose sum is σ = 1461509552. Its totient is φ = 1461509550.

The previous prime is 1461509537. The next prime is 1461509563. The reversal of 1461509551 is 1559051641.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1461509551 - 2⁵ = 1461509519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1461509551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1461509501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 730754775 + 730754776.

It is an arithmetic number, because the mean of its divisors is an integer number (730754776).

Almost surely, 2^1461509551 is an apocalyptic number.

1461509551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1461509551 is an equidigital number, since it uses as much as digits as its factorization.

1461509551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 37.

The square root of 1461509551 is about 38229.6946234207. The cubic root of 1461509551 is about 1134.8380424461.

The spelling of 1461509551 in words is "one billion, four hundred sixty-one million, five hundred nine thousand, five hundred fifty-one".