39746154621 has 4 divisors (see below), whose sum is σ = 52994872832. Its totient is φ = 26497436412.

The previous prime is 39746154601. The next prime is 39746154647. The reversal of 39746154621 is 12645164793.

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 not a de Polignac number, because 39746154621 - 2⁷ = 39746154493 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 (39746154601) 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, 6624359101 + ... + 6624359106.

It is an arithmetic number, because the mean of its divisors is an integer number (13248718208).

Almost surely, 2^39746154621 is an apocalyptic number.

It is an amenable number.

39746154621 is a deficient number, since it is larger than the sum of its proper divisors (13248718211).

39746154621 is a wasteful number, since it uses less digits than its factorization.

39746154621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13248718210.

The product of its digits is 1088640, while the sum is 48.

The spelling of 39746154621 in words is "thirty-nine billion, seven hundred forty-six million, one hundred fifty-four thousand, six hundred twenty-one".