13777661072 has 40 divisors (see below), whose sum is σ = 30623742336. Its totient is φ = 5882247936.

The previous prime is 13777661039. The next prime is 13777661081. The reversal of 13777661072 is 27016677731.

It is a super-2 number, since 2×13777661072² (a number of 21 digits) contains 22 as substring.

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, 204413 + ... + 263324.

Almost surely, 2^13777661072 is an apocalyptic number.

It is an amenable number.

13777661072 is an abundant number, since it is smaller than the sum of its proper divisors (16846081264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13777661072 is a wasteful number, since it uses less digits than its factorization.

13777661072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468015 (or 468009 counting only the distinct ones).

The product of its (nonzero) digits is 518616, while the sum is 47.

The spelling of 13777661072 in words is "thirteen billion, seven hundred seventy-seven million, six hundred sixty-one thousand, seventy-two".