61975780 has 12 divisors (see below), whose sum is σ = 130149180. Its totient is φ = 24790304.

The previous prime is 61975747. The next prime is 61975787. The reversal of 61975780 is 8757916.

It can be written as a sum of positive squares in 2 ways, for example, as 22963264 + 39012516 = 4792^2 + 6246^2 .

It is not an unprimeable number, because it can be changed into a prime (61975787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1549375 + ... + 1549414.

It is an arithmetic number, because the mean of its divisors is an integer number (10845765).

Almost surely, 2^61975780 is an apocalyptic number.

It is an amenable number.

61975780 is an abundant number, since it is smaller than the sum of its proper divisors (68173400).

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

61975780 is a wasteful number, since it uses less digits than its factorization.

61975780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3098798 (or 3098796 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 61975780 is about 7872.4697522442. The cubic root of 61975780 is about 395.7376165487.

The spelling of 61975780 in words is "sixty-one million, nine hundred seventy-five thousand, seven hundred eighty".