53406720040 has 32 divisors (see below), whose sum is σ = 120428104680. Its totient is φ = 21315935232.

The previous prime is 53406720023. The next prime is 53406720053. The reversal of 53406720040 is 4002760435.

It can be written as a sum of positive squares in 4 ways, for example, as 53048223684 + 358496356 = 230322^2 + 18934^2 .

It is a junction number, because it is equal to n+sod(n) for n = 53406719984 and 53406720011.

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, 1442517 + ... + 1479076.

Almost surely, 2^53406720040 is an apocalyptic number.

It is an amenable number.

53406720040 is an abundant number, since it is smaller than the sum of its proper divisors (67021384640).

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

53406720040 is a wasteful number, since it uses less digits than its factorization.

53406720040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2922061 (or 2922057 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 31.

The spelling of 53406720040 in words is "fifty-three billion, four hundred six million, seven hundred twenty thousand, forty".