39497375661 has 4 divisors (see below), whose sum is σ = 52663167552. Its totient is φ = 26331583772.

The previous prime is 39497375657. The next prime is 39497375681. The reversal of 39497375661 is 16657379493.

It is a happy number.

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 not a de Polignac number, because 39497375661 - 2² = 39497375657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39497375595 and 39497375604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39497375611) 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 3 ways as a sum of consecutive naturals, for example, 6582895941 + ... + 6582895946.

It is an arithmetic number, because the mean of its divisors is an integer number (13165791888).

Almost surely, 2^39497375661 is an apocalyptic number.

It is an amenable number.

39497375661 is a deficient number, since it is larger than the sum of its proper divisors (13165791891).

39497375661 is a wasteful number, since it uses less digits than its factorization.

39497375661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13165791890.

The product of its digits is 25719120, while the sum is 60.

The spelling of 39497375661 in words is "thirty-nine billion, four hundred ninety-seven million, three hundred seventy-five thousand, six hundred sixty-one".