61655010553 has 4 divisors (see below), whose sum is σ = 62098571920. Its totient is φ = 61211449188.

The previous prime is 61655010551. The next prime is 61655010581. The reversal of 61655010553 is 35501055616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61655010553 - 2¹ = 61655010551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61655010551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221780475 + ... + 221780752.

It is an arithmetic number, because the mean of its divisors is an integer number (15524642980).

Almost surely, 2^61655010553 is an apocalyptic number.

It is an amenable number.

61655010553 is a deficient number, since it is larger than the sum of its proper divisors (443561367).

61655010553 is a wasteful number, since it uses less digits than its factorization.

61655010553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443561366.

The product of its (nonzero) digits is 67500, while the sum is 37.

The spelling of 61655010553 in words is "sixty-one billion, six hundred fifty-five million, ten thousand, five hundred fifty-three".