61656403 has 2 divisors, whose sum is σ = 61656404. Its totient is φ = 61656402.

The previous prime is 61656391. The next prime is 61656449. The reversal of 61656403 is 30465616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61656403 - 2²¹ = 59559251 is a prime.

It is not a weakly prime, because it can be changed into another prime (61656473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30828201 + 30828202.

It is an arithmetic number, because the mean of its divisors is an integer number (30828202).

Almost surely, 2^61656403 is an apocalyptic number.

61656403 is a deficient number, since it is larger than the sum of its proper divisors (1).

61656403 is an equidigital number, since it uses as much as digits as its factorization.

61656403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 61656403 is about 7852.1591298190. The cubic root of 61656403 is about 395.0566665485.

The spelling of 61656403 in words is "sixty-one million, six hundred fifty-six thousand, four hundred three".