11655402021645 has 16 divisors (see below), whose sum is σ = 18651830632512. Its totient is φ = 6215151945600.

The previous prime is 11655402021619. The next prime is 11655402021647. The reversal of 11655402021645 is 54612020455611.

It is a happy number.

It is not a de Polignac number, because 11655402021645 - 2¹⁵ = 11655401988877 is a prime.

It is a super-3 number, since 3×11655402021645³ (a number of 40 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11655402021597 and 11655402021606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11655402021647) 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, 66313432 + ... + 66488961.

It is an arithmetic number, because the mean of its divisors is an integer number (1165739414532).

Almost surely, 2^{11655402021645} is an apocalyptic number.

11655402021645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11655402021645 is a deficient number, since it is larger than the sum of its proper divisors (6996428610867).

11655402021645 is a wasteful number, since it uses less digits than its factorization.

11655402021645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132808252.

The product of its (nonzero) digits is 288000, while the sum is 42.

The spelling of 11655402021645 in words is "eleven trillion, six hundred fifty-five billion, four hundred two million, twenty-one thousand, six hundred forty-five".