61543354761 has 24 divisors (see below), whose sum is σ = 101790434304. Its totient is φ = 35100112320.

The previous prime is 61543354757. The next prime is 61543354777. The reversal of 61543354761 is 16745334516.

61543354761 is a `hidden beast` number, since 6 + 1 + 5 + 43 + 3 + 547 + 61 = 666.

It is not a de Polignac number, because 61543354761 - 2² = 61543354757 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61543356761) 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, 904681 + ... + 970326.

It is an arithmetic number, because the mean of its divisors is an integer number (4241268096).

Almost surely, 2^61543354761 is an apocalyptic number.

It is an amenable number.

61543354761 is a deficient number, since it is larger than the sum of its proper divisors (40247079543).

61543354761 is a wasteful number, since it uses less digits than its factorization.

61543354761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1875541 (or 1875538 counting only the distinct ones).

The product of its digits is 907200, while the sum is 45.

The spelling of 61543354761 in words is "sixty-one billion, five hundred forty-three million, three hundred fifty-four thousand, seven hundred sixty-one".