61455061 has 4 divisors (see below), whose sum is σ = 61631500. Its totient is φ = 61278624.

The previous prime is 61455059. The next prime is 61455067. The reversal of 61455061 is 16055416.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16966161 + 44488900 = 4119^2 + 6670^2 .

It is a cyclic number.

It is not a de Polignac number, because 61455061 - 2¹ = 61455059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61455067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87696 + ... + 88393.

It is an arithmetic number, because the mean of its divisors is an integer number (15407875).

Almost surely, 2^61455061 is an apocalyptic number.

It is an amenable number.

61455061 is a deficient number, since it is larger than the sum of its proper divisors (176439).

61455061 is a wasteful number, since it uses less digits than its factorization.

61455061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176438.

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

The square root of 61455061 is about 7839.3278410843. The cubic root of 61455061 is about 394.6261719844.

The spelling of 61455061 in words is "sixty-one million, four hundred fifty-five thousand, sixty-one".