138344815306461 has 8 divisors (see below), whose sum is σ = 184468346540064. Its totient is φ = 92225580471920.

The previous prime is 138344815306457. The next prime is 138344815306463. The reversal of 138344815306461 is 164603518443831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138344815306461 - 2² = 138344815306457 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138344815306463) 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, 1074024630 + ... + 1074153431.

It is an arithmetic number, because the mean of its divisors is an integer number (23058543317508).

Almost surely, 2^{138344815306461} is an apocalyptic number.

It is an amenable number.

138344815306461 is a deficient number, since it is larger than the sum of its proper divisors (46123531233603).

138344815306461 is a wasteful number, since it uses less digits than its factorization.

138344815306461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2148199531.

The product of its (nonzero) digits is 19906560, while the sum is 57.

The spelling of 138344815306461 in words is "one hundred thirty-eight trillion, three hundred forty-four billion, eight hundred fifteen million, three hundred six thousand, four hundred sixty-one".