15488041981 has 16 divisors (see below), whose sum is σ = 16456500864. Its totient is φ = 14526065664.

The previous prime is 15488041889. The next prime is 15488041991. The reversal of 15488041981 is 18914088451.

It is a cyclic number.

It is not a de Polignac number, because 15488041981 - 2¹⁹ = 15487517693 is a prime.

It is a super-2 number, since 2×15488041981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15488041991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8685616 + ... + 8687398.

It is an arithmetic number, because the mean of its divisors is an integer number (1028531304).

Almost surely, 2^15488041981 is an apocalyptic number.

It is an amenable number.

15488041981 is a deficient number, since it is larger than the sum of its proper divisors (968458883).

15488041981 is a wasteful number, since it uses less digits than its factorization.

15488041981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3300.

The product of its (nonzero) digits is 368640, while the sum is 49.

The spelling of 15488041981 in words is "fifteen billion, four hundred eighty-eight million, forty-one thousand, nine hundred eighty-one".