61578234570732 has 288 divisors, whose sum is σ = 171607524721920. Its totient is φ = 16984370073600.

The previous prime is 61578234570631. The next prime is 61578234570737. The reversal of 61578234570732 is 23707543287516.

It is a super-2 number, since 2×61578234570732² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61578234570737) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3469773883 + ... + 3469791629.

It is an arithmetic number, because the mean of its divisors is an integer number (595859460840).

Almost surely, 2^{61578234570732} is an apocalyptic number.

61578234570732 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61578234570732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85803762360960).

61578234570732 is an abundant number, since it is smaller than the sum of its proper divisors (110029290151188).

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

61578234570732 is a wasteful number, since it uses less digits than its factorization.

61578234570732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19453 (or 19420 counting only the distinct ones).

The product of its (nonzero) digits is 59270400, while the sum is 60.

The spelling of 61578234570732 in words is "sixty-one trillion, five hundred seventy-eight billion, two hundred thirty-four million, five hundred seventy thousand, seven hundred thirty-two".