61885650240 has 224 divisors, whose sum is σ = 219467704320. Its totient is φ = 16416000000.

The previous prime is 61885650227. The next prime is 61885650247. The reversal of 61885650240 is 4205658816.

61885650240 is a `hidden beast` number, since 6 + 1 + 88 + 565 + 0 + 2 + 4 + 0 = 666.

It is a super-2 number, since 2×61885650240² (a number of 22 digits) contains 22 as substring.

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 (61885650247) 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, 1631490 + ... + 1668990.

Almost surely, 2^61885650240 is an apocalyptic number.

61885650240 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 61885650240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109733852160).

61885650240 is an abundant number, since it is smaller than the sum of its proper divisors (157582054080).

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

61885650240 is a wasteful number, since it uses less digits than its factorization.

61885650240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37718 (or 37702 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The spelling of 61885650240 in words is "sixty-one billion, eight hundred eighty-five million, six hundred fifty thousand, two hundred forty".