149391638001 has 6 divisors (see below), whose sum is σ = 215787921570. Its totient is φ = 99594425328.

The previous prime is 149391637951. The next prime is 149391638027. The reversal of 149391638001 is 100836193941.

149391638001 is a `hidden beast` number, since 1 + 4 + 9 + 3 + 9 + 1 + 638 + 0 + 0 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 130292121600 + 19099516401 = 360960^2 + 138201^2 .

It is not a de Polignac number, because 149391638001 - 2¹⁹ = 149391113713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149391638041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8299535436 + ... + 8299535453.

It is an arithmetic number, because the mean of its divisors is an integer number (35964653595).

Almost surely, 2^149391638001 is an apocalyptic number.

It is an amenable number.

149391638001 is a deficient number, since it is larger than the sum of its proper divisors (66396283569).

149391638001 is a wasteful number, since it uses less digits than its factorization.

149391638001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16599070895 (or 16599070892 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The spelling of 149391638001 in words is "one hundred forty-nine billion, three hundred ninety-one million, six hundred thirty-eight thousand, one".