61595259516 has 192 divisors, whose sum is σ = 193877376000. Its totient is φ = 16519023360.

The previous prime is 61595259499. The next prime is 61595259527.

61595259516 is a `hidden beast` number, since 6 + 15 + 9 + 525 + 95 + 16 = 666.

61595259516 is nontrivially palindromic in base 10.

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

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, 1546006 + ... + 1585346.

It is an arithmetic number, because the mean of its divisors is an integer number (1009778000).

Almost surely, 2^61595259516 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 61595259516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96938688000).

61595259516 is an abundant number, since it is smaller than the sum of its proper divisors (132282116484).

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

61595259516 is a wasteful number, since it uses less digits than its factorization.

61595259516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39489 (or 39481 counting only the distinct ones).

The product of its digits is 3645000, while the sum is 54.

The spelling of 61595259516 in words is "sixty-one billion, five hundred ninety-five million, two hundred fifty-nine thousand, five hundred sixteen".