61091712000 has 704 divisors, whose sum is σ = 246473210880. Its totient is φ = 14800896000.

The previous prime is 61091711963. The next prime is 61091712013. The reversal of 61091712000 is 21719016.

It is a tau number, because it is divible by the number of its divisors (704).

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 38015197 + ... + 38016803.

Almost surely, 2^61091712000 is an apocalyptic number.

61091712000 is a gapful number since it is divisible by the number (60) 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 61091712000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123236605440).

61091712000 is an abundant number, since it is smaller than the sum of its proper divisors (185381498880).

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

61091712000 is a wasteful number, since it uses less digits than its factorization.

61091712000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662 (or 1628 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The spelling of 61091712000 in words is "sixty-one billion, ninety-one million, seven hundred twelve thousand".