61273718380 has 24 divisors (see below), whose sum is σ = 147056924448. Its totient is φ = 21008131968.

The previous prime is 61273718369. The next prime is 61273718381. The reversal of 61273718380 is 8381737216.

61273718380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61273718380² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61273718380.

It is not an unprimeable number, because it can be changed into a prime (61273718381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218834569 + ... + 218834848.

It is an arithmetic number, because the mean of its divisors is an integer number (6127371852).

Almost surely, 2^61273718380 is an apocalyptic number.

It is an amenable number.

61273718380 is an abundant number, since it is smaller than the sum of its proper divisors (85783206068).

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

61273718380 is a wasteful number, since it uses less digits than its factorization.

61273718380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437669433 (or 437669431 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 61273718380 in words is "sixty-one billion, two hundred seventy-three million, seven hundred eighteen thousand, three hundred eighty".