13851621345 has 16 divisors (see below), whose sum is σ = 22877517312. Its totient is φ = 7149223680.

The previous prime is 13851621323. The next prime is 13851621353. The reversal of 13851621345 is 54312615831.

It is not a de Polignac number, because 13851621345 - 2⁹ = 13851620833 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14893752 + ... + 14894681.

It is an arithmetic number, because the mean of its divisors is an integer number (1429844832).

Almost surely, 2^13851621345 is an apocalyptic number.

13851621345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13851621345 is a deficient number, since it is larger than the sum of its proper divisors (9025895967).

13851621345 is a wasteful number, since it uses less digits than its factorization.

13851621345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29788472.

The product of its digits is 86400, while the sum is 39.

The spelling of 13851621345 in words is "thirteen billion, eight hundred fifty-one million, six hundred twenty-one thousand, three hundred forty-five".