2455406621644 has 12 divisors (see below), whose sum is σ = 4296997414864. Its totient is φ = 1227693074544.

The previous prime is 2455406621573. The next prime is 2455406621653. The reversal of 2455406621644 is 4461266045542.

It is a super-2 number, since 2×2455406621644² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2006079 + ... + 2989174.

Almost surely, 2^{2455406621644} is an apocalyptic number.

It is an amenable number.

2455406621644 is a deficient number, since it is larger than the sum of its proper divisors (1841590793220).

2455406621644 is a wasteful number, since it uses less digits than its factorization.

2455406621644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5118144 (or 5118142 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 49.

The spelling of 2455406621644 in words is "two trillion, four hundred fifty-five billion, four hundred six million, six hundred twenty-one thousand, six hundred forty-four".