61898958241 has 4 divisors (see below), whose sum is σ = 62002296000. Its totient is φ = 61795620484.

The previous prime is 61898958221. The next prime is 61898958293. The reversal of 61898958241 is 14285989816.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61898958241 - 2²³ = 61890569633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61898958241.

It is not an unprimeable number, because it can be changed into a prime (61898958221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51667981 + ... + 51669178.

It is an arithmetic number, because the mean of its divisors is an integer number (15500574000).

Almost surely, 2^61898958241 is an apocalyptic number.

It is an amenable number.

61898958241 is a deficient number, since it is larger than the sum of its proper divisors (103337759).

61898958241 is a wasteful number, since it uses less digits than its factorization.

61898958241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103337758.

The product of its digits is 9953280, while the sum is 61.

The spelling of 61898958241 in words is "sixty-one billion, eight hundred ninety-eight million, nine hundred fifty-eight thousand, two hundred forty-one".