61145534653 has 4 divisors (see below), whose sum is σ = 69880611040. Its totient is φ = 52410458268.

The previous prime is 61145534647. The next prime is 61145534657. The reversal of 61145534653 is 35643554116.

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 not a de Polignac number, because 61145534653 - 2³³ = 52555600061 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 (61145534657) 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, 4367538183 + ... + 4367538196.

It is an arithmetic number, because the mean of its divisors is an integer number (17470152760).

Almost surely, 2^61145534653 is an apocalyptic number.

It is an amenable number.

61145534653 is a deficient number, since it is larger than the sum of its proper divisors (8735076387).

61145534653 is an equidigital number, since it uses as much as digits as its factorization.

61145534653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8735076386.

The product of its digits is 648000, while the sum is 43.

The spelling of 61145534653 in words is "sixty-one billion, one hundred forty-five million, five hundred thirty-four thousand, six hundred fifty-three".