3551939100391 has 4 divisors (see below), whose sum is σ = 3874842654984. Its totient is φ = 3229035545800.

The previous prime is 3551939100361. The next prime is 3551939100427. The reversal of 3551939100391 is 1930019391553.

3551939100391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3551939100391 - 2¹³ = 3551939092199 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3551939100361) 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, 161451777280 + ... + 161451777301.

It is an arithmetic number, because the mean of its divisors is an integer number (968710663746).

Almost surely, 2^{3551939100391} is an apocalyptic number.

3551939100391 is a deficient number, since it is larger than the sum of its proper divisors (322903554593).

3551939100391 is a wasteful number, since it uses less digits than its factorization.

3551939100391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322903554592.

The product of its (nonzero) digits is 492075, while the sum is 49.

The spelling of 3551939100391 in words is "three trillion, five hundred fifty-one billion, nine hundred thirty-nine million, one hundred thousand, three hundred ninety-one".