621606140949 has 16 divisors (see below), whose sum is σ = 849419936064. Its totient is φ = 404107670400.

The previous prime is 621606140861. The next prime is 621606140957. The reversal of 621606140949 is 949041606126.

621606140949 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 621606140949 - 2²⁹ = 621069270037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 621606140898 and 621606140907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621606140149) 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, 916879 + ... + 1443564.

It is an arithmetic number, because the mean of its divisors is an integer number (53088746004).

Almost surely, 2^621606140949 is an apocalyptic number.

It is an amenable number.

621606140949 is a deficient number, since it is larger than the sum of its proper divisors (227813795115).

621606140949 is a wasteful number, since it uses less digits than its factorization.

621606140949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362628.

The product of its (nonzero) digits is 559872, while the sum is 48.

The spelling of 621606140949 in words is "six hundred twenty-one billion, six hundred six million, one hundred forty thousand, nine hundred forty-nine".