61895581437 has 8 divisors (see below), whose sum is σ = 82547830240. Its totient is φ = 41253526800.

The previous prime is 61895581393. The next prime is 61895581453. The reversal of 61895581437 is 73418559816.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61895581437 - 2³⁰ = 60821839613 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 (61895581457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2534362 + ... + 2558667.

It is an arithmetic number, because the mean of its divisors is an integer number (10318478780).

Almost surely, 2^61895581437 is an apocalyptic number.

It is an amenable number.

61895581437 is a deficient number, since it is larger than the sum of its proper divisors (20652248803).

61895581437 is a wasteful number, since it uses less digits than its factorization.

61895581437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5097083.

The product of its digits is 7257600, while the sum is 57.

The spelling of 61895581437 in words is "sixty-one billion, eight hundred ninety-five million, five hundred eighty-one thousand, four hundred thirty-seven".