139240647690 has 16 divisors (see below), whose sum is σ = 334177554528. Its totient is φ = 37130839376.

The previous prime is 139240647631. The next prime is 139240647697. The reversal of 139240647690 is 96746042931.

It is a happy number.

It is a super-2 number, since 2×139240647690² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (139240647697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2320677432 + ... + 2320677491.

It is an arithmetic number, because the mean of its divisors is an integer number (20886097158).

Almost surely, 2^139240647690 is an apocalyptic number.

139240647690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139240647690 is an abundant number, since it is smaller than the sum of its proper divisors (194936906838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139240647690 is a wasteful number, since it uses less digits than its factorization.

139240647690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4641354933.

The product of its (nonzero) digits is 1959552, while the sum is 51.

The spelling of 139240647690 in words is "one hundred thirty-nine billion, two hundred forty million, six hundred forty-seven thousand, six hundred ninety".