138249802930 has 32 divisors (see below), whose sum is σ = 251911222128. Its totient is φ = 54622176000.

The previous prime is 138249802921. The next prime is 138249802979. The reversal of 138249802930 is 39208942831.

It can be written as a sum of positive squares in 8 ways, for example, as 74776543209 + 63473259721 = 273453^2 + 251939^2 .

It is a super-2 number, since 2×138249802930² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262644 + ... + 587776.

Almost surely, 2^138249802930 is an apocalyptic number.

138249802930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138249802930 is a deficient number, since it is larger than the sum of its proper divisors (113661419198).

138249802930 is a wasteful number, since it uses less digits than its factorization.

138249802930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325662.

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 138249802930 in words is "one hundred thirty-eight billion, two hundred forty-nine million, eight hundred two thousand, nine hundred thirty".