61548854279491 has 8 divisors (see below), whose sum is σ = 62863442104320. Its totient is φ = 60234476360328.

The previous prime is 61548854279477. The next prime is 61548854279509. The reversal of 61548854279491 is 19497245884516.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61548854279491 is a prime.

It is a super-3 number, since 3×61548854279491³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61548854276491) 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, 51883641 + ... + 53056666.

It is an arithmetic number, because the mean of its divisors is an integer number (7857930263040).

Almost surely, 2^{61548854279491} is an apocalyptic number.

61548854279491 is a deficient number, since it is larger than the sum of its proper divisors (1314587824829).

61548854279491 is a wasteful number, since it uses less digits than its factorization.

61548854279491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104952833.

The product of its digits is 696729600, while the sum is 73.

The spelling of 61548854279491 in words is "sixty-one trillion, five hundred forty-eight billion, eight hundred fifty-four million, two hundred seventy-nine thousand, four hundred ninety-one".