61210662240 has 384 divisors, whose sum is σ = 238212817920. Its totient is φ = 12865609728.

The previous prime is 61210662199. The next prime is 61210662287. The reversal of 61210662240 is 4226601216.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 61210662198 and 61210662207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12096831 + ... + 12101889.

It is an arithmetic number, because the mean of its divisors is an integer number (620345880).

Almost surely, 2^61210662240 is an apocalyptic number.

61210662240 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 61210662240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119106408960).

61210662240 is an abundant number, since it is smaller than the sum of its proper divisors (177002155680).

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

61210662240 is a wasteful number, since it uses less digits than its factorization.

61210662240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5374 (or 5366 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The spelling of 61210662240 in words is "sixty-one billion, two hundred ten million, six hundred sixty-two thousand, two hundred forty".