10402180665 has 32 divisors (see below), whose sum is σ = 17772825600. Its totient is φ = 5183727360.

The previous prime is 10402180661. The next prime is 10402180699. The reversal of 10402180665 is 56608120401.

It is not a de Polignac number, because 10402180665 - 2² = 10402180661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10402180661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 372210 + ... + 399179.

It is an arithmetic number, because the mean of its divisors is an integer number (555400800).

Almost surely, 2^10402180665 is an apocalyptic number.

10402180665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10402180665 is a deficient number, since it is larger than the sum of its proper divisors (7370644935).

10402180665 is a wasteful number, since it uses less digits than its factorization.

10402180665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771457.

The product of its (nonzero) digits is 11520, while the sum is 33.

The spelling of 10402180665 in words is "ten billion, four hundred two million, one hundred eighty thousand, six hundred sixty-five".