61726178353812 has 144 divisors (see below), whose sum is σ = 176374263240000. Its totient is φ = 16706534777856.

The previous prime is 61726178353783. The next prime is 61726178353823. The reversal of 61726178353812 is 21835387162716.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 147585564 + ... + 148003212.

It is an arithmetic number, because the mean of its divisors is an integer number (1224821272500).

Almost surely, 2^{61726178353812} 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 61726178353812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88187131620000).

61726178353812 is an abundant number, since it is smaller than the sum of its proper divisors (114648084886188).

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

61726178353812 is a wasteful number, since it uses less digits than its factorization.

61726178353812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430918 (or 430909 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 60.

The spelling of 61726178353812 in words is "sixty-one trillion, seven hundred twenty-six billion, one hundred seventy-eight million, three hundred fifty-three thousand, eight hundred twelve".