61442701947144 has 128 divisors (see below), whose sum is σ = 195309849504000. Its totient is φ = 17532228943872.

The previous prime is 61442701947139. The next prime is 61442701947223. The reversal of 61442701947144 is 44174910724416.

It is a happy number.

61442701947144 is a `hidden beast` number, since 6 + 1 + 44 + 270 + 194 + 7 + 144 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25259059 + ... + 27584514.

It is an arithmetic number, because the mean of its divisors is an integer number (1525858199250).

Almost surely, 2^{61442701947144} is an apocalyptic number.

It is an amenable number.

61442701947144 is an abundant number, since it is smaller than the sum of its proper divisors (133867147556856).

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

61442701947144 is a wasteful number, since it uses less digits than its factorization.

61442701947144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52844364 (or 52844354 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 61442701947144 in words is "sixty-one trillion, four hundred forty-two billion, seven hundred one million, nine hundred forty-seven thousand, one hundred forty-four".