61376551 has 2 divisors, whose sum is σ = 61376552. Its totient is φ = 61376550.

The previous prime is 61376537. The next prime is 61376561. The reversal of 61376551 is 15567316.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61376551 - 2⁵ = 61376519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61376521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30688275 + 30688276.

It is an arithmetic number, because the mean of its divisors is an integer number (30688276).

Almost surely, 2^61376551 is an apocalyptic number.

61376551 is a deficient number, since it is larger than the sum of its proper divisors (1).

61376551 is an equidigital number, since it uses as much as digits as its factorization.

61376551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18900, while the sum is 34.

The square root of 61376551 is about 7834.3187961686. The cubic root of 61376551 is about 394.4580529120.

The spelling of 61376551 in words is "sixty-one million, three hundred seventy-six thousand, five hundred fifty-one".