61302239840 has 48 divisors (see below), whose sum is σ = 145464630192. Its totient is φ = 24412859904.

The previous prime is 61302239827. The next prime is 61302239857. The reversal of 61302239840 is 4893220316.

61302239840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 61302239794 and 61302239803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 807599 + ... + 880238.

It is an arithmetic number, because the mean of its divisors is an integer number (3030513129).

Almost surely, 2^61302239840 is an apocalyptic number.

It is an amenable number.

61302239840 is an abundant number, since it is smaller than the sum of its proper divisors (84162390352).

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

61302239840 is a wasteful number, since it uses less digits than its factorization.

61302239840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688079 (or 1688071 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 61302239840 in words is "sixty-one billion, three hundred two million, two hundred thirty-nine thousand, eight hundred forty".