61237820340 has 48 divisors (see below), whose sum is σ = 190517664960. Its totient is φ = 16330085280.

The previous prime is 61237820317. The next prime is 61237820341. The reversal of 61237820340 is 4302873216.

It is a happy number.

61237820340 is a `hidden beast` number, since 6 + 1 + 237 + 82 + 0 + 340 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 61237820295 and 61237820304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61237820341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56701146 + ... + 56702225.

It is an arithmetic number, because the mean of its divisors is an integer number (3969118020).

Almost surely, 2^61237820340 is an apocalyptic number.

61237820340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61237820340 is an abundant number, since it is smaller than the sum of its proper divisors (129279844620).

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

61237820340 is a wasteful number, since it uses less digits than its factorization.

61237820340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113403389 (or 113403381 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 61237820340 in words is "sixty-one billion, two hundred thirty-seven million, eight hundred twenty thousand, three hundred forty".