39649814121 has 16 divisors (see below), whose sum is σ = 53424152640. Its totient is φ = 26155792320.

The previous prime is 39649814107. The next prime is 39649814189. The reversal of 39649814121 is 12141894693.

It is a happy number.

It is not a de Polignac number, because 39649814121 - 2³⁵ = 5290075753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39649884121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71526 + ... + 290543.

It is an arithmetic number, because the mean of its divisors is an integer number (3339009540).

Almost surely, 2^39649814121 is an apocalyptic number.

It is an amenable number.

39649814121 is a deficient number, since it is larger than the sum of its proper divisors (13774338519).

39649814121 is a wasteful number, since it uses less digits than its factorization.

39649814121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362456.

The product of its digits is 373248, while the sum is 48.

The spelling of 39649814121 in words is "thirty-nine billion, six hundred forty-nine million, eight hundred fourteen thousand, one hundred twenty-one".