61553600212640 has 48 divisors (see below), whose sum is σ = 145440645216552. Its totient is φ = 24618009022464.

The previous prime is 61553600212631. The next prime is 61553600212651. The reversal of 61553600212640 is 4621200635516.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 48918106245904 + 12635493966736 = 6994148^2 + 3554644^2 .

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, 25653269 + ... + 27949908.

Almost surely, 2^{61553600212640} is an apocalyptic number.

It is an amenable number.

61553600212640 is an abundant number, since it is smaller than the sum of its proper divisors (83887045003912).

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

61553600212640 is a wasteful number, since it uses less digits than its factorization.

61553600212640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53610369 (or 53610361 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 61553600212640 in words is "sixty-one trillion, five hundred fifty-three billion, six hundred million, two hundred twelve thousand, six hundred forty".