61006100091 has 8 divisors (see below), whose sum is σ = 86126259024. Its totient is φ = 38278337280.

The previous prime is 61006100081. The next prime is 61006100107. The reversal of 61006100091 is 19000160016.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61006100091 - 2⁷ = 61006099963 is a prime.

It is a super-2 number, since 2×61006100091² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61006100081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 598098970 + ... + 598099071.

It is an arithmetic number, because the mean of its divisors is an integer number (10765782378).

Almost surely, 2^61006100091 is an apocalyptic number.

61006100091 is a deficient number, since it is larger than the sum of its proper divisors (25120158933).

61006100091 is a wasteful number, since it uses less digits than its factorization.

61006100091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196198061.

The product of its (nonzero) digits is 324, while the sum is 24.

The spelling of 61006100091 in words is "sixty-one billion, six million, one hundred thousand, ninety-one".