61941377952 has 144 divisors (see below), whose sum is σ = 181073273472. Its totient is φ = 20070581760.

The previous prime is 61941377933. The next prime is 61941377957. The reversal of 61941377952 is 25977314916.

61941377952 is a `hidden beast` number, since 619 + 4 + 13 + 7 + 7 + 9 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (61941377957) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16099293 + ... + 16103139.

It is an arithmetic number, because the mean of its divisors is an integer number (1257453288).

Almost surely, 2^61941377952 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 61941377952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90536636736).

61941377952 is an abundant number, since it is smaller than the sum of its proper divisors (119131895520).

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

61941377952 is a wasteful number, since it uses less digits than its factorization.

61941377952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5411 (or 5400 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 54.

The spelling of 61941377952 in words is "sixty-one billion, nine hundred forty-one million, three hundred seventy-seven thousand, nine hundred fifty-two".