71961252453 has 12 divisors (see below), whose sum is σ = 103952897100. Its totient is φ = 47970076416.

The previous prime is 71961252449. The next prime is 71961252499. The reversal of 71961252453 is 35425216917.

71961252453 is a `hidden beast` number, since 7 + 1 + 9 + 612 + 5 + 24 + 5 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 56014108929 + 15947143524 = 236673^2 + 126282^2 .

It is not a de Polignac number, because 71961252453 - 2² = 71961252449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71961252399 and 71961252408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71961252353) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 227628 + ... + 442421.

It is an arithmetic number, because the mean of its divisors is an integer number (8662741425).

Almost surely, 2^71961252453 is an apocalyptic number.

It is an amenable number.

71961252453 is a deficient number, since it is larger than the sum of its proper divisors (31991644647).

71961252453 is a wasteful number, since it uses less digits than its factorization.

71961252453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681988 (or 681985 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The spelling of 71961252453 in words is "seventy-one billion, nine hundred sixty-one million, two hundred fifty-two thousand, four hundred fifty-three".