61141780 has 24 divisors (see below), whose sum is σ = 146740608. Its totient is φ = 20962848.

The previous prime is 61141739. The next prime is 61141799. The reversal of 61141780 is 8714116.

61141780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218224 + ... + 218503.

It is an arithmetic number, because the mean of its divisors is an integer number (6114192).

Almost surely, 2^61141780 is an apocalyptic number.

It is an amenable number.

61141780 is an abundant number, since it is smaller than the sum of its proper divisors (85598828).

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

61141780 is a wasteful number, since it uses less digits than its factorization.

61141780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436743 (or 436741 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 61141780 is about 7819.3209423837. The cubic root of 61141780 is about 393.9544640616.

Adding to 61141780 its reverse (8714116), we get a palindrome (69855896).

The spelling of 61141780 in words is "sixty-one million, one hundred forty-one thousand, seven hundred eighty".