61026755277400 has 144 divisors (see below), whose sum is σ = 156060626402520. Its totient is φ = 22177039104000.

The previous prime is 61026755277373. The next prime is 61026755277403. The reversal of 61026755277400 is 477255762016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61026755277403) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 36226632 + ... + 37873768.

Almost surely, 2^{61026755277400} 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 61026755277400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78030313201260).

61026755277400 is an abundant number, since it is smaller than the sum of its proper divisors (95033871125120).

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

61026755277400 is a wasteful number, since it uses less digits than its factorization.

61026755277400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648706 (or 1648686 counting only the distinct ones).

The product of its (nonzero) digits is 4939200, while the sum is 52.

The spelling of 61026755277400 in words is "sixty-one trillion, twenty-six billion, seven hundred fifty-five million, two hundred seventy-seven thousand, four hundred".