61075053149 has 4 divisors (see below), whose sum is σ = 66627330720. Its totient is φ = 55522775580.

The previous prime is 61075053071. The next prime is 61075053157. The reversal of 61075053149 is 94135057016.

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 a de Polignac number, because none of the positive numbers 2^k-61075053149 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 (61075053649) 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, 2776138769 + ... + 2776138790.

It is an arithmetic number, because the mean of its divisors is an integer number (16656832680).

Almost surely, 2^61075053149 is an apocalyptic number.

It is an amenable number.

61075053149 is a deficient number, since it is larger than the sum of its proper divisors (5552277571).

61075053149 is a wasteful number, since it uses less digits than its factorization.

61075053149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5552277570.

The product of its (nonzero) digits is 113400, while the sum is 41.

The spelling of 61075053149 in words is "sixty-one billion, seventy-five million, fifty-three thousand, one hundred forty-nine".