53555401640 has 64 divisors (see below), whose sum is σ = 130959536400. Its totient is φ = 19592865792.

The previous prime is 53555401621. The next prime is 53555401661. The reversal of 53555401640 is 4610455535.

It can be written as a sum of positive squares in 8 ways, for example, as 19514413636 + 34040988004 = 139694^2 + 184502^2 .

It is a junction number, because it is equal to n+sod(n) for n = 53555401594 and 53555401603.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415757 + ... + 529116.

Almost surely, 2^53555401640 is an apocalyptic number.

It is an amenable number.

53555401640 is an abundant number, since it is smaller than the sum of its proper divisors (77404134760).

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

53555401640 is a wasteful number, since it uses less digits than its factorization.

53555401640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945006 (or 945002 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 53555401640 in words is "fifty-three billion, five hundred fifty-five million, four hundred one thousand, six hundred forty".