61897272483 has 4 divisors (see below), whose sum is σ = 82529696648. Its totient is φ = 41264848320.

The previous prime is 61897272473. The next prime is 61897272487. The reversal of 61897272483 is 38427279816.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-61897272483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61897272487) 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, 10316212078 + ... + 10316212083.

It is an arithmetic number, because the mean of its divisors is an integer number (20632424162).

Almost surely, 2^61897272483 is an apocalyptic number.

61897272483 is a deficient number, since it is larger than the sum of its proper divisors (20632424165).

61897272483 is a wasteful number, since it uses less digits than its factorization.

61897272483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20632424164.

The product of its digits is 8128512, while the sum is 57.

The spelling of 61897272483 in words is "sixty-one billion, eight hundred ninety-seven million, two hundred seventy-two thousand, four hundred eighty-three".