403649740256 has 144 divisors (see below), whose sum is σ = 988316435232. Its totient is φ = 158844518400.

The previous prime is 403649740217. The next prime is 403649740279. The reversal of 403649740256 is 652047946304.

It is a super-2 number, since 2×403649740256² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2578136 + ... + 2730216.

It is an arithmetic number, because the mean of its divisors is an integer number (6863308578).

Almost surely, 2^403649740256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 403649740256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (494158217616).

403649740256 is an abundant number, since it is smaller than the sum of its proper divisors (584666694976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

403649740256 is a wasteful number, since it uses less digits than its factorization.

403649740256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152173 (or 152148 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 50.

The spelling of 403649740256 in words is "four hundred three billion, six hundred forty-nine million, seven hundred forty thousand, two hundred fifty-six".