61461555 has 16 divisors (see below), whose sum is σ = 98595744. Its totient is φ = 32693760.

The previous prime is 61461541. The next prime is 61461559. The reversal of 61461555 is 55516416.

It is not a de Polignac number, because 61461555 - 2⁷ = 61461427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61461559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 795 + ... + 11115.

It is an arithmetic number, because the mean of its divisors is an integer number (6162234).

Almost surely, 2^61461555 is an apocalyptic number.

61461555 is a deficient number, since it is larger than the sum of its proper divisors (37134189).

61461555 is a wasteful number, since it uses less digits than its factorization.

61461555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10726.

The product of its digits is 18000, while the sum is 33.

The square root of 61461555 is about 7839.7420238169. The cubic root of 61461555 is about 394.6400716375.

The spelling of 61461555 in words is "sixty-one million, four hundred sixty-one thousand, five hundred fifty-five".