61567051620 has 48 divisors (see below), whose sum is σ = 178332154560. Its totient is φ = 15851746176.

The previous prime is 61567051619. The next prime is 61567051621. The reversal of 61567051620 is 2615076516.

It is an interprime number because it is at equal distance from previous prime (61567051619) and next prime (61567051621).

It is not an unprimeable number, because it can be changed into a prime (61567051621) 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, 17689942 + ... + 17693421.

It is an arithmetic number, because the mean of its divisors is an integer number (3715253220).

Almost surely, 2^61567051620 is an apocalyptic number.

61567051620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61567051620 is an abundant number, since it is smaller than the sum of its proper divisors (116765102940).

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

61567051620 is a wasteful number, since it uses less digits than its factorization.

61567051620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35383404 (or 35383402 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 61567051620 in words is "sixty-one billion, five hundred sixty-seven million, fifty-one thousand, six hundred twenty".