61123772599 has 4 divisors (see below), whose sum is σ = 62125801720. Its totient is φ = 60121743480.

The previous prime is 61123772557. The next prime is 61123772617. The reversal of 61123772599 is 99527732116.

61123772599 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61123772599 - 2⁷ = 61123772471 is a prime.

It is a super-2 number, since 2×61123772599² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61123772509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501014469 + ... + 501014590.

It is an arithmetic number, because the mean of its divisors is an integer number (15531450430).

Almost surely, 2^61123772599 is an apocalyptic number.

61123772599 is a deficient number, since it is larger than the sum of its proper divisors (1002029121).

61123772599 is a wasteful number, since it uses less digits than its factorization.

61123772599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002029120.

The product of its digits is 1428840, while the sum is 52.

The spelling of 61123772599 in words is "sixty-one billion, one hundred twenty-three million, seven hundred seventy-two thousand, five hundred ninety-nine".