139905409245 has 64 divisors (see below), whose sum is σ = 262097289216. Its totient is φ = 62397815040.

The previous prime is 139905409141. The next prime is 139905409247. The reversal of 139905409245 is 542904509931.

It is not a de Polignac number, because 139905409245 - 2¹⁶ = 139905343709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139905409247) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1519680 + ... + 1609110.

It is an arithmetic number, because the mean of its divisors is an integer number (4095270144).

Almost surely, 2^139905409245 is an apocalyptic number.

139905409245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139905409245 is a deficient number, since it is larger than the sum of its proper divisors (122191879971).

139905409245 is a wasteful number, since it uses less digits than its factorization.

139905409245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89810.

The product of its (nonzero) digits is 1749600, while the sum is 51.

The spelling of 139905409245 in words is "one hundred thirty-nine billion, nine hundred five million, four hundred nine thousand, two hundred forty-five".