149161687638 has 8 divisors (see below), whose sum is σ = 298323375288. Its totient is φ = 49720562544.

The previous prime is 149161687627. The next prime is 149161687639. The reversal of 149161687638 is 836786161941.

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

149161687638 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149161687639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12430140631 + ... + 12430140642.

It is an arithmetic number, because the mean of its divisors is an integer number (37290421911).

Almost surely, 2^149161687638 is an apocalyptic number.

149161687638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

149161687638 is a wasteful number, since it uses less digits than its factorization.

149161687638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24860281278.

The product of its digits is 10450944, while the sum is 60.

The spelling of 149161687638 in words is "one hundred forty-nine billion, one hundred sixty-one million, six hundred eighty-seven thousand, six hundred thirty-eight".