60991056 has 180 divisors, whose sum is σ = 205007712. Its totient is φ = 17216064.

The previous prime is 60991039. The next prime is 60991057. The reversal of 60991056 is 65019906.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 60991056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60991057) 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 35 ways as a sum of consecutive naturals, for example, 734791 + ... + 734873.

Almost surely, 2^60991056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 60991056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102503856).

60991056 is an abundant number, since it is smaller than the sum of its proper divisors (144016656).

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

60991056 is an frugal number, since it uses more digits than its factorization.

60991056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 60991056 is about 7809.6770739897. The cubic root of 60991056 is about 393.6304780087.

The spelling of 60991056 in words is "sixty million, nine hundred ninety-one thousand, fifty-six".