61813880750 has 32 divisors (see below), whose sum is σ = 115733741760. Its totient is φ = 24721672800.

The previous prime is 61813880731. The next prime is 61813880753. The reversal of 61813880750 is 5708831816.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61813880695 and 61813880704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61813880753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1994372 + ... + 2025128.

It is an arithmetic number, because the mean of its divisors is an integer number (3616679430).

Almost surely, 2^61813880750 is an apocalyptic number.

61813880750 is a deficient number, since it is larger than the sum of its proper divisors (53919861010).

61813880750 is a wasteful number, since it uses less digits than its factorization.

61813880750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38813 (or 38803 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 47.

The spelling of 61813880750 in words is "sixty-one billion, eight hundred thirteen million, eight hundred eighty thousand, seven hundred fifty".