61659753460 has 24 divisors (see below), whose sum is σ = 129503736936. Its totient is φ = 24660424320.

The previous prime is 61659753403. The next prime is 61659753469. The reversal of 61659753460 is 6435795616.

It can be written as a sum of positive squares in 4 ways, for example, as 5109962256 + 56549791204 = 71484^2 + 237802^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61659753398 and 61659753407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61659753469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69451 + ... + 357970.

It is an arithmetic number, because the mean of its divisors is an integer number (5395989039).

Almost surely, 2^61659753460 is an apocalyptic number.

It is an amenable number.

61659753460 is an abundant number, since it is smaller than the sum of its proper divisors (67843983476).

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

61659753460 is a wasteful number, since it uses less digits than its factorization.

61659753460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434643 (or 434641 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 52.

The spelling of 61659753460 in words is "sixty-one billion, six hundred fifty-nine million, seven hundred fifty-three thousand, four hundred sixty".