61603652871 has 16 divisors (see below), whose sum is σ = 91297342720. Its totient is φ = 41054399640.

The previous prime is 61603652863. The next prime is 61603652881. The reversal of 61603652871 is 17825630616.

61603652871 is a `hidden beast` number, since 6 + 1 + 6 + 0 + 365 + 287 + 1 = 666.

It is not a de Polignac number, because 61603652871 - 2³ = 61603652863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61603652821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 331315 + ... + 482676.

It is an arithmetic number, because the mean of its divisors is an integer number (5706083920).

Almost surely, 2^61603652871 is an apocalyptic number.

61603652871 is a deficient number, since it is larger than the sum of its proper divisors (29693689849).

61603652871 is a wasteful number, since it uses less digits than its factorization.

61603652871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816803 (or 816797 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 61603652871 in words is "sixty-one billion, six hundred three million, six hundred fifty-two thousand, eight hundred seventy-one".