139471266465 has 48 divisors (see below), whose sum is σ = 256010363856. Its totient is φ = 69998284800.

The previous prime is 139471266463. The next prime is 139471266491. The reversal of 139471266465 is 564662174931.

It is a happy number.

139471266465 is a `hidden beast` number, since 1 + 3 + 94 + 71 + 26 + 6 + 465 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 175112289 + 139296154176 = 13233^2 + 373224^2 .

It is not a de Polignac number, because 139471266465 - 2¹ = 139471266463 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139471266463) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7687605 + ... + 7705725.

It is an arithmetic number, because the mean of its divisors is an integer number (5333549247).

Almost surely, 2^139471266465 is an apocalyptic number.

139471266465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139471266465 is a deficient number, since it is larger than the sum of its proper divisors (116539097391).

139471266465 is a wasteful number, since it uses less digits than its factorization.

139471266465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28210 (or 28207 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The spelling of 139471266465 in words is "one hundred thirty-nine billion, four hundred seventy-one million, two hundred sixty-six thousand, four hundred sixty-five".