61005551053 has 4 divisors (see below), whose sum is σ = 61106055040. Its totient is φ = 60905047068.

The previous prime is 61005551051. The next prime is 61005551153. The reversal of 61005551053 is 35015550016.

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 61005551053 - 2¹ = 61005551051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61005551051) 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, 50251083 + ... + 50252296.

It is an arithmetic number, because the mean of its divisors is an integer number (15276513760).

Almost surely, 2^61005551053 is an apocalyptic number.

It is an amenable number.

61005551053 is a deficient number, since it is larger than the sum of its proper divisors (100503987).

61005551053 is a wasteful number, since it uses less digits than its factorization.

61005551053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100503986.

The product of its (nonzero) digits is 11250, while the sum is 31.

The spelling of 61005551053 in words is "sixty-one billion, five million, five hundred fifty-one thousand, fifty-three".