61211536053 has 4 divisors (see below), whose sum is σ = 81615381408. Its totient is φ = 40807690700.

The previous prime is 61211536033. The next prime is 61211536103. The reversal of 61211536053 is 35063511216.

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 61211536053 - 2⁶ = 61211535989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61211536003) 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, 10201922673 + ... + 10201922678.

It is an arithmetic number, because the mean of its divisors is an integer number (20403845352).

Almost surely, 2^61211536053 is an apocalyptic number.

It is an amenable number.

61211536053 is a deficient number, since it is larger than the sum of its proper divisors (20403845355).

61211536053 is a wasteful number, since it uses less digits than its factorization.

61211536053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20403845354.

The product of its (nonzero) digits is 16200, while the sum is 33.

The spelling of 61211536053 in words is "sixty-one billion, two hundred eleven million, five hundred thirty-six thousand, fifty-three".