61909147053 has 18 divisors (see below), whose sum is σ = 96307304366. Its totient is φ = 38096280432.

The previous prime is 61909147051. The next prime is 61909147057. The reversal of 61909147053 is 35074190916.

61909147053 is a `hidden beast` number, since 6 + 1 + 90 + 91 + 470 + 5 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 42860178729 + 19048968324 = 207027^2 + 138018^2 .

It is not a de Polignac number, because 61909147053 - 2¹ = 61909147051 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61909147051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2679850 + ... + 2702852.

Almost surely, 2^61909147053 is an apocalyptic number.

It is an amenable number.

61909147053 is a deficient number, since it is larger than the sum of its proper divisors (34398157313).

61909147053 is an frugal number, since it uses more digits than its factorization.

61909147053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46025 (or 23019 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The spelling of 61909147053 in words is "sixty-one billion, nine hundred nine million, one hundred forty-seven thousand, fifty-three".