1517939489661 has 32 divisors (see below), whose sum is σ = 2330961739776. Its totient is φ = 860700000000.

The previous prime is 1517939489629. The next prime is 1517939489683. The reversal of 1517939489661 is 1669849397151.

It is not a de Polignac number, because 1517939489661 - 2⁵ = 1517939489629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1517939487661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1136536 + ... + 2080286.

It is an arithmetic number, because the mean of its divisors is an integer number (72842554368).

Almost surely, 2^{1517939489661} is an apocalyptic number.

It is an amenable number.

1517939489661 is a deficient number, since it is larger than the sum of its proper divisors (813022250115).

1517939489661 is a wasteful number, since it uses less digits than its factorization.

1517939489661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944353.

The product of its digits is 88179840, while the sum is 69.

The spelling of 1517939489661 in words is "one trillion, five hundred seventeen billion, nine hundred thirty-nine million, four hundred eighty-nine thousand, six hundred sixty-one".