61323851412 has 96 divisors (see below), whose sum is σ = 162570240000. Its totient is φ = 19981753056.

The previous prime is 61323851411. The next prime is 61323851441. The reversal of 61323851412 is 21415832316.

61323851412 is a `hidden beast` number, since 6 + 1 + 3 + 238 + 5 + 1 + 412 = 666.

It is a super-2 number, since 2×61323851412² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61323851411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4373589 + ... + 4387587.

It is an arithmetic number, because the mean of its divisors is an integer number (1693440000).

Almost surely, 2^61323851412 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 61323851412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81285120000).

61323851412 is an abundant number, since it is smaller than the sum of its proper divisors (101246388588).

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

61323851412 is a wasteful number, since it uses less digits than its factorization.

61323851412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14922 (or 14914 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The spelling of 61323851412 in words is "sixty-one billion, three hundred twenty-three million, eight hundred fifty-one thousand, four hundred twelve".