21649448405510 has 16 divisors (see below), whose sum is σ = 41261301667296. Its totient is φ = 8150380576128.

The previous prime is 21649448405509. The next prime is 21649448405539. The reversal of 21649448405510 is 1550484494612.

It is a happy number.

It is a congruent number.

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, 63674848082 + ... + 63674848421.

It is an arithmetic number, because the mean of its divisors is an integer number (2578831354206).

Almost surely, 2^{21649448405510} is an apocalyptic number.

21649448405510 is a deficient number, since it is larger than the sum of its proper divisors (19611853261786).

21649448405510 is a wasteful number, since it uses less digits than its factorization.

21649448405510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127349696527.

The product of its (nonzero) digits is 5529600, while the sum is 53.

The spelling of 21649448405510 in words is "twenty-one trillion, six hundred forty-nine billion, four hundred forty-eight million, four hundred five thousand, five hundred ten".