38961781654049 has 16 divisors (see below), whose sum is σ = 40125509941440. Its totient is φ = 37809809069760.

The previous prime is 38961781654039. The next prime is 38961781654057. The reversal of 38961781654049 is 94045618716983.

It is a cyclic number.

It is not a de Polignac number, because 38961781654049 - 2³⁶ = 38893062177313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38961781654039) 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, 74398379 + ... + 74920239.

It is an arithmetic number, because the mean of its divisors is an integer number (2507844371340).

Almost surely, 2^{38961781654049} is an apocalyptic number.

It is an amenable number.

38961781654049 is a deficient number, since it is larger than the sum of its proper divisors (1163728287391).

38961781654049 is a wasteful number, since it uses less digits than its factorization.

38961781654049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533120.

The product of its (nonzero) digits is 313528320, while the sum is 71.

The spelling of 38961781654049 in words is "thirty-eight trillion, nine hundred sixty-one billion, seven hundred eighty-one million, six hundred fifty-four thousand, forty-nine".