61511958 has 24 divisors (see below), whose sum is σ = 137872800. Its totient is φ = 19796784.

The previous prime is 61511953. The next prime is 61511969. The reversal of 61511958 is 85911516.

61511958 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61511951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58398 + ... + 59441.

It is an arithmetic number, because the mean of its divisors is an integer number (5744700).

Almost surely, 2^61511958 is an apocalyptic number.

61511958 is an abundant number, since it is smaller than the sum of its proper divisors (76360842).

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

61511958 is a wasteful number, since it uses less digits than its factorization.

61511958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117876 (or 117873 counting only the distinct ones).

The product of its digits is 10800, while the sum is 36.

The square root of 61511958 is about 7842.9559478554. The cubic root of 61511958 is about 394.7479201326.

The spelling of 61511958 in words is "sixty-one million, five hundred eleven thousand, nine hundred fifty-eight".