61506451 has 2 divisors, whose sum is σ = 61506452. Its totient is φ = 61506450.

The previous prime is 61506443. The next prime is 61506461. The reversal of 61506451 is 15460516.

61506451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61506451 - 2³ = 61506443 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61506421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30753225 + 30753226.

It is an arithmetic number, because the mean of its divisors is an integer number (30753226).

Almost surely, 2^61506451 is an apocalyptic number.

61506451 is a deficient number, since it is larger than the sum of its proper divisors (1).

61506451 is an equidigital number, since it uses as much as digits as its factorization.

61506451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 61506451 is about 7842.6048606314. The cubic root of 61506451 is about 394.7361395415.

Adding to 61506451 its reverse (15460516), we get a palindrome (76966967).

The spelling of 61506451 in words is "sixty-one million, five hundred six thousand, four hundred fifty-one".