61723742530 has 32 divisors (see below), whose sum is σ = 112655317104. Its totient is φ = 24346699776.

The previous prime is 61723742501. The next prime is 61723742537. The reversal of 61723742530 is 3524732716.

It can be written as a sum of positive squares in 8 ways, for example, as 35854558609 + 25869183921 = 189353^2 + 160839^2 .

It is a super-4 number, since 4×61723742530⁴ (a number of 44 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (61723742537) 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, 83974 + ... + 361246.

Almost surely, 2^61723742530 is an apocalyptic number.

61723742530 is a deficient number, since it is larger than the sum of its proper divisors (50931574574).

61723742530 is a wasteful number, since it uses less digits than its factorization.

61723742530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277590.

The product of its (nonzero) digits is 211680, while the sum is 40.

The spelling of 61723742530 in words is "sixty-one billion, seven hundred twenty-three million, seven hundred forty-two thousand, five hundred thirty".