61326139392 has 504 divisors, whose sum is σ = 211527335136. Its totient is φ = 17414258688.

The previous prime is 61326139379. The next prime is 61326139397. The reversal of 61326139392 is 29393162316.

61326139392 is a `hidden beast` number, since 613 + 26 + 1 + 3 + 9 + 3 + 9 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (504).

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61326139397) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 376233903 + ... + 376234065.

Almost surely, 2^61326139392 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 61326139392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105763667568).

61326139392 is an abundant number, since it is smaller than the sum of its proper divisors (150201195744).

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

61326139392 is an frugal number, since it uses more digits than its factorization.

61326139392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 175 counting only the distinct ones).

The product of its digits is 314928, while the sum is 45.

It can be divided in two parts, 613261 and 39392, that added together give a triangular number (652653 = T₁₁₄₂).

The spelling of 61326139392 in words is "sixty-one billion, three hundred twenty-six million, one hundred thirty-nine thousand, three hundred ninety-two".