53541401661 has 24 divisors (see below), whose sum is σ = 85238060544. Its totient is φ = 32114799360.

The previous prime is 53541401647. The next prime is 53541401681. The reversal of 53541401661 is 16610414535.

53541401661 is a `hidden beast` number, since 5 + 3 + 541 + 40 + 16 + 61 = 666.

It is not a de Polignac number, because 53541401661 - 2²⁷ = 53407183933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53541401611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2778141 + ... + 2797346.

It is an arithmetic number, because the mean of its divisors is an integer number (3551585856).

Almost surely, 2^53541401661 is an apocalyptic number.

It is an amenable number.

53541401661 is a deficient number, since it is larger than the sum of its proper divisors (31696658883).

53541401661 is a wasteful number, since it uses less digits than its factorization.

53541401661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5575601 (or 5575598 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 53541401661 in words is "fifty-three billion, five hundred forty-one million, four hundred one thousand, six hundred sixty-one".