61520325261304 has 256 divisors, whose sum is σ = 144628785100800. Its totient is φ = 23886166284288.

The previous prime is 61520325261281. The next prime is 61520325261319. The reversal of 61520325261304 is 40316252302516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8653861302 + ... + 8653868410.

It is an arithmetic number, because the mean of its divisors is an integer number (564956191800).

Almost surely, 2^{61520325261304} 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 61520325261304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72314392550400).

61520325261304 is an abundant number, since it is smaller than the sum of its proper divisors (83108459839496).

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

61520325261304 is a wasteful number, since it uses less digits than its factorization.

61520325261304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8142 (or 8138 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 61520325261304 in words is "sixty-one trillion, five hundred twenty billion, three hundred twenty-five million, two hundred sixty-one thousand, three hundred four".