149690836201 has 9 divisors (see below), whose sum is σ = 150210690903. Its totient is φ = 149172778440.

The previous prime is 149690836157. The next prime is 149690836213. The reversal of 149690836201 is 102638096941.

It is a happy number.

The square root of 149690836201 is 386899.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 710275801 + 148980560400 = 26651^2 + 385980^2 .

It is not a de Polignac number, because 149690836201 - 2³¹ = 147543352553 is a prime.

It is a super-2 number, since 2×149690836201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149690836231) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 162884020 + ... + 162884938.

It is an arithmetic number, because the mean of its divisors is an integer number (16690076767).

Almost surely, 2^149690836201 is an apocalyptic number.

149690836201 is the 386899-th square number.

149690836201 is the 193450-th centered octagonal number.

It is an amenable number.

149690836201 is a deficient number, since it is larger than the sum of its proper divisors (519854702).

149690836201 is an frugal number, since it uses more digits than its factorization.

149690836201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2680 (or 1340 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 49.

Multiplying 149690836201 by its sum of digits (49), we get a square (7334850973849 = 2708293²).

The spelling of 149690836201 in words is "one hundred forty-nine billion, six hundred ninety million, eight hundred thirty-six thousand, two hundred one".