149795900781 has 16 divisors (see below), whose sum is σ = 206691912000. Its totient is φ = 96384474368.

The previous prime is 149795900777. The next prime is 149795900827. The reversal of 149795900781 is 187009597941.

It is a cyclic number.

It is not a de Polignac number, because 149795900781 - 2² = 149795900777 is a prime.

It is a super-2 number, since 2×149795900781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149795900711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84156 + ... + 553781.

It is an arithmetic number, because the mean of its divisors is an integer number (12918244500).

Almost surely, 2^149795900781 is an apocalyptic number.

It is an amenable number.

149795900781 is a deficient number, since it is larger than the sum of its proper divisors (56896011219).

149795900781 is a wasteful number, since it uses less digits than its factorization.

149795900781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640668.

The product of its (nonzero) digits is 5715360, while the sum is 60.

The spelling of 149795900781 in words is "one hundred forty-nine billion, seven hundred ninety-five million, nine hundred thousand, seven hundred eighty-one".