50601021561 has 12 divisors (see below), whose sum is σ = 73186419540. Its totient is φ = 33689681280.

The previous prime is 50601021557. The next prime is 50601021617. The reversal of 50601021561 is 16512010605.

It is a happy number.

50601021561 is a `hidden beast` number, since 5 + 0 + 601 + 0 + 2 + 1 + 56 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3509851536 + 47091170025 = 59244^2 + 217005^2 .

It is not a de Polignac number, because 50601021561 - 2² = 50601021557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (50601021551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3687196 + ... + 3700893.

It is an arithmetic number, because the mean of its divisors is an integer number (6098868295).

Almost surely, 2^50601021561 is an apocalyptic number.

It is an amenable number.

50601021561 is a deficient number, since it is larger than the sum of its proper divisors (22585397979).

50601021561 is a wasteful number, since it uses less digits than its factorization.

50601021561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7388856 (or 7388853 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The spelling of 50601021561 in words is "fifty billion, six hundred one million, twenty-one thousand, five hundred sixty-one".