354154721881 has 9 divisors (see below), whose sum is σ = 366805939773. Its totient is φ = 341925827040.

The previous prime is 354154721807. The next prime is 354154721897. The reversal of 354154721881 is 188127451453.

The square root of 354154721881 is 595109.

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

It can be written as a sum of positive squares in 4 ways, for example, as 10219390281 + 343935331600 = 101091^2 + 586460^2 .

It is not a de Polignac number, because 354154721881 - 2²³ = 354146333273 is a prime.

It is a super-2 number, since 2×354154721881² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (354154721981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 17247901 + ... + 17268421.

Almost surely, 2^354154721881 is an apocalyptic number.

354154721881 is the 595109-th square number.

354154721881 is the 297555-th centered octagonal number.

It is an amenable number.

354154721881 is a deficient number, since it is larger than the sum of its proper divisors (12651217892).

354154721881 is an frugal number, since it uses more digits than its factorization.

354154721881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41100 (or 20550 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 49.

Multiplying 354154721881 by its sum of digits (49), we get a square (17353581372169 = 4165763²).

The spelling of 354154721881 in words is "three hundred fifty-four billion, one hundred fifty-four million, seven hundred twenty-one thousand, eight hundred eighty-one".