61565954 has 4 divisors (see below), whose sum is σ = 92348934. Its totient is φ = 30782976.

The previous prime is 61565953. The next prime is 61565957. The reversal of 61565954 is 45956516.

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

It can be written as a sum of positive squares in only one way, i.e., 52171729 + 9394225 = 7223^2 + 3065^2 .

It is not an unprimeable number, because it can be changed into a prime (61565951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15391487 + ... + 15391490.

Almost surely, 2^61565954 is an apocalyptic number.

61565954 is a deficient number, since it is larger than the sum of its proper divisors (30782980).

61565954 is a wasteful number, since it uses less digits than its factorization.

61565954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30782979.

The product of its digits is 162000, while the sum is 41.

The square root of 61565954 is about 7846.3975173324. The cubic root of 61565954 is about 394.8633913116.

The spelling of 61565954 in words is "sixty-one million, five hundred sixty-five thousand, nine hundred fifty-four".