139631420835 has 32 divisors (see below), whose sum is σ = 254006522880. Its totient is φ = 72738225504.

The previous prime is 139631420833. The next prime is 139631420837. The reversal of 139631420835 is 538024136931.

139631420835 is a `hidden beast` number, since 1 + 3 + 9 + 631 + 4 + 2 + 0 + 8 + 3 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (139631420833) and next prime (139631420837).

It is not a de Polignac number, because 139631420835 - 2¹ = 139631420833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (139631420833) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12021019 + ... + 12032628.

It is an arithmetic number, because the mean of its divisors is an integer number (7937703840).

Almost surely, 2^139631420835 is an apocalyptic number.

139631420835 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

139631420835 is a deficient number, since it is larger than the sum of its proper divisors (114375102045).

139631420835 is a wasteful number, since it uses less digits than its factorization.

139631420835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24053704 (or 24053698 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 139631420835 in words is "one hundred thirty-nine billion, six hundred thirty-one million, four hundred twenty thousand, eight hundred thirty-five".