61550658 has 32 divisors (see below), whose sum is σ = 147302400. Its totient is φ = 18938448.

The previous prime is 61550653. The next prime is 61550663. The reversal of 61550658 is 85605516.

It is an interprime number because it is at equal distance from previous prime (61550653) and next prime (61550663).

It is not an unprimeable number, because it can be changed into a prime (61550651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43138 + ... + 44541.

It is an arithmetic number, because the mean of its divisors is an integer number (4603200).

Almost surely, 2^61550658 is an apocalyptic number.

61550658 is an abundant number, since it is smaller than the sum of its proper divisors (85751742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61550658 is a wasteful number, since it uses less digits than its factorization.

61550658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87703 (or 87697 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 61550658 is about 7845.4227419560. The cubic root of 61550658 is about 394.8306874641.

The spelling of 61550658 in words is "sixty-one million, five hundred fifty thousand, six hundred fifty-eight".