161266251454 has 16 divisors (see below), whose sum is σ = 301588834176. Its totient is φ = 62831007000.

The previous prime is 161266251439. The next prime is 161266251491. The reversal of 161266251454 is 454152662161.

It is a super-3 number, since 3×161266251454³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 161266251454.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 523591572 + ... + 523591879.

It is an arithmetic number, because the mean of its divisors is an integer number (18849302136).

Almost surely, 2^161266251454 is an apocalyptic number.

161266251454 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

161266251454 is a deficient number, since it is larger than the sum of its proper divisors (140322582722).

161266251454 is a wasteful number, since it uses less digits than its factorization.

161266251454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047183471.

The product of its digits is 345600, while the sum is 43.

The spelling of 161266251454 in words is "one hundred sixty-one billion, two hundred sixty-six million, two hundred fifty-one thousand, four hundred fifty-four".