61827393240 has 192 divisors, whose sum is σ = 207785410560. Its totient is φ = 15927425280.

The previous prime is 61827393223. The next prime is 61827393247. The reversal of 61827393240 is 4239372816.

61827393240 is a `hidden beast` number, since 6 + 18 + 2 + 7 + 393 + 240 = 666.

61827393240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61827393247) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6769557 + ... + 6778683.

It is an arithmetic number, because the mean of its divisors is an integer number (1082215680).

Almost surely, 2^61827393240 is an apocalyptic number.

61827393240 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 61827393240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103892705280).

61827393240 is an abundant number, since it is smaller than the sum of its proper divisors (145958017320).

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

61827393240 is a wasteful number, since it uses less digits than its factorization.

61827393240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9782 (or 9775 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 61827393240 in words is "sixty-one billion, eight hundred twenty-seven million, three hundred ninety-three thousand, two hundred forty".