61508380 has 24 divisors (see below), whose sum is σ = 136766448. Its totient is φ = 23155968.

The previous prime is 61508351. The next prime is 61508387. The reversal of 61508380 is 8380516.

61508380 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 (61508387) 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 7 ways as a sum of consecutive naturals, for example, 90114 + ... + 90793.

It is an arithmetic number, because the mean of its divisors is an integer number (5698602).

Almost surely, 2^61508380 is an apocalyptic number.

It is an amenable number.

61508380 is an abundant number, since it is smaller than the sum of its proper divisors (75258068).

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

61508380 is a wasteful number, since it uses less digits than its factorization.

61508380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180933 (or 180931 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 61508380 is about 7842.7278417653. The cubic root of 61508380 is about 394.7402661442.

Adding to 61508380 its reverse (8380516), we get a palindrome (69888896).

The spelling of 61508380 in words is "sixty-one million, five hundred eight thousand, three hundred eighty".