61640062257630 has 32 divisors (see below), whose sum is σ = 147937707482400. Its totient is φ = 16437176817152.

The previous prime is 61640062257593. The next prime is 61640062257647. The reversal of 61640062257630 is 3675226004616.

61640062257630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 61640062257630.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7911135 + ... + 13633274.

It is an arithmetic number, because the mean of its divisors is an integer number (4623053358825).

Almost surely, 2^{61640062257630} is an apocalyptic number.

61640062257630 is an abundant number, since it is smaller than the sum of its proper divisors (86297645224770).

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

61640062257630 is a wasteful number, since it uses less digits than its factorization.

61640062257630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21639788.

The product of its (nonzero) digits is 2177280, while the sum is 48.

The spelling of 61640062257630 in words is "sixty-one trillion, six hundred forty billion, sixty-two million, two hundred fifty-seven thousand, six hundred thirty".