61850231040 has 576 divisors, whose sum is σ = 224561885184. Its totient is φ = 14393769984.

The previous prime is 61850231039. The next prime is 61850231057. The reversal of 61850231040 is 4013205816.

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 = 61850230989 and 61850231007.

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, 118260219 + ... + 118260741.

It is an arithmetic number, because the mean of its divisors is an integer number (389864384).

Almost surely, 2^61850231040 is an apocalyptic number.

61850231040 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 61850231040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112280942592).

61850231040 is an abundant number, since it is smaller than the sum of its proper divisors (162711654144).

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

61850231040 is a wasteful number, since it uses less digits than its factorization.

61850231040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686 (or 672 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 61850231040 its reverse (4013205816), we get a palindrome (65863436856).

The spelling of 61850231040 in words is "sixty-one billion, eight hundred fifty million, two hundred thirty-one thousand, forty".