61615451 has 2 divisors, whose sum is σ = 61615452. Its totient is φ = 61615450.

The previous prime is 61615439. The next prime is 61615469. The reversal of 61615451 is 15451616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61615451 - 2⁶ = 61615387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61615481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30807725 + 30807726.

It is an arithmetic number, because the mean of its divisors is an integer number (30807726).

Almost surely, 2^61615451 is an apocalyptic number.

61615451 is a deficient number, since it is larger than the sum of its proper divisors (1).

61615451 is an equidigital number, since it uses as much as digits as its factorization.

61615451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 29.

The square root of 61615451 is about 7849.5510062678. The cubic root of 61615451 is about 394.9691820212.

The spelling of 61615451 in words is "sixty-one million, six hundred fifteen thousand, four hundred fifty-one".