61978176 has 224 divisors, whose sum is σ = 204825600. Its totient is φ = 18247680.

The previous prime is 61978157. The next prime is 61978177. The reversal of 61978176 is 67187916.

It is not an unprimeable number, because it can be changed into a prime (61978177) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 696340 + ... + 696428.

It is an arithmetic number, because the mean of its divisors is an integer number (914400).

Almost surely, 2^61978176 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 61978176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102412800).

61978176 is an abundant number, since it is smaller than the sum of its proper divisors (142847424).

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

61978176 is a wasteful number, since it uses less digits than its factorization.

61978176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 138 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 61978176 is about 7872.6219266519. The cubic root of 61978176 is about 395.7427162565.

The spelling of 61978176 in words is "sixty-one million, nine hundred seventy-eight thousand, one hundred seventy-six".