61561654 has 24 divisors (see below), whose sum is σ = 116003664. Its totient is φ = 23984400.

The previous prime is 61561651. The next prime is 61561663. The reversal of 61561654 is 45616516.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61561651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16477 + ... + 19864.

It is an arithmetic number, because the mean of its divisors is an integer number (4833486).

Almost surely, 2^61561654 is an apocalyptic number.

61561654 is a deficient number, since it is larger than the sum of its proper divisors (54442010).

61561654 is a wasteful number, since it uses less digits than its factorization.

61561654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36372 (or 36361 counting only the distinct ones).

The product of its digits is 21600, while the sum is 34.

The square root of 61561654 is about 7846.1235014496. The cubic root of 61561654 is about 394.8541981780.

The spelling of 61561654 in words is "sixty-one million, five hundred sixty-one thousand, six hundred fifty-four".