138880770363694 has 4 divisors (see below), whose sum is σ = 208321155545544. Its totient is φ = 69440385181846.

The previous prime is 138880770363653. The next prime is 138880770363719. The reversal of 138880770363694 is 496363077088831.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×138880770363694² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34720192590922 + ... + 34720192590925.

It is an arithmetic number, because the mean of its divisors is an integer number (52080288886386).

Almost surely, 2^{138880770363694} is an apocalyptic number.

138880770363694 is a deficient number, since it is larger than the sum of its proper divisors (69440385181850).

138880770363694 is an equidigital number, since it uses as much as digits as its factorization.

138880770363694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69440385181849.

The product of its (nonzero) digits is 877879296, while the sum is 73.

The spelling of 138880770363694 in words is "one hundred thirty-eight trillion, eight hundred eighty billion, seven hundred seventy million, three hundred sixty-three thousand, six hundred ninety-four".