11651655 has 16 divisors (see below), whose sum is σ = 19624320. Its totient is φ = 5887008.

The previous prime is 11651621. The next prime is 11651657. The reversal of 11651655 is 55615611.

11651655 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11651655 - 2⁸ = 11651399 is a prime.

It is a super-2 number, since 2×11651655² = 271522128478050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11651657) 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, 20157 + ... + 20726.

It is an arithmetic number, because the mean of its divisors is an integer number (1226520).

Almost surely, 2^11651655 is an apocalyptic number.

11651655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11651655 is a deficient number, since it is larger than the sum of its proper divisors (7972665).

11651655 is a wasteful number, since it uses less digits than its factorization.

11651655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40910.

The product of its digits is 4500, while the sum is 30.

The square root of 11651655 is about 3413.4520649923. The cubic root of 11651655 is about 226.7057518624.

The spelling of 11651655 in words is "eleven million, six hundred fifty-one thousand, six hundred fifty-five".