5551981257601 has 8 divisors (see below), whose sum is σ = 5557102591680. Its totient is φ = 5546861162832.

The previous prime is 5551981257577. The next prime is 5551981257689. The reversal of 5551981257601 is 1067521891555.

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

It is a cyclic number.

It is not a de Polignac number, because 5551981257601 - 2²¹ = 5551979160449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5551981257401) 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, 8776711 + ... + 9388003.

It is an arithmetic number, because the mean of its divisors is an integer number (694637823960).

Almost surely, 2^{5551981257601} is an apocalyptic number.

It is an amenable number.

5551981257601 is a deficient number, since it is larger than the sum of its proper divisors (5121334079).

5551981257601 is a wasteful number, since it uses less digits than its factorization.

5551981257601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619655.

The product of its (nonzero) digits is 3780000, while the sum is 55.

The spelling of 5551981257601 in words is "five trillion, five hundred fifty-one billion, nine hundred eighty-one million, two hundred fifty-seven thousand, six hundred one".