61153980 has 48 divisors (see below), whose sum is σ = 172150944. Its totient is φ = 16220160.

The previous prime is 61153973. The next prime is 61153999. The reversal of 61153980 is 8935116.

61153980 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 an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8940 + ... + 14220.

It is an arithmetic number, because the mean of its divisors is an integer number (3586478).

Almost surely, 2^61153980 is an apocalyptic number.

61153980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61153980 is an abundant number, since it is smaller than the sum of its proper divisors (110996964).

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

61153980 is a wasteful number, since it uses less digits than its factorization.

61153980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5486 (or 5484 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 61153980 is about 7820.1010223654. The cubic root of 61153980 is about 393.9806650479.

The spelling of 61153980 in words is "sixty-one million, one hundred fifty-three thousand, nine hundred eighty".