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151851668381 = 7211326173923
BaseRepresentation
bin1000110101101100010…
…0001001001110011101
3112111221210201000100222
42031123010021032131
54441443011342011
6153432032131125
713654011612230
oct2153304111635
9474853630328
10151851668381
1159444342aa6
122551a996aa5
131142009011a
1474c7677417
153e3b441ddb
hex235b10939d

151851668381 has 16 divisors (see below), whose sum is σ = 173737517184. Its totient is φ = 130014111744.

The previous prime is 151851668363. The next prime is 151851668431. The reversal of 151851668381 is 183866158151.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-151851668381 is a prime.

It is a super-2 number, since 2×1518516683812 (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 (151851668341) 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, 38706086 + ... + 38710008.

It is an arithmetic number, because the mean of its divisors is an integer number (10858594824).

Almost surely, 2151851668381 is an apocalyptic number.

It is an amenable number.

151851668381 is a deficient number, since it is larger than the sum of its proper divisors (21885848803).

151851668381 is a wasteful number, since it uses less digits than its factorization.

151851668381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8660.

The product of its digits is 1382400, while the sum is 53.

The spelling of 151851668381 in words is "one hundred fifty-one billion, eight hundred fifty-one million, six hundred sixty-eight thousand, three hundred eighty-one".

Divisors: 1 7 2113 2617 3923 14791 18319 27461 5529721 8289299 10266491 38708047 58025093 71865437 21693095483 151851668381