15442671487 has 16 divisors (see below), whose sum is σ = 15637367200. Its totient is φ = 15249669120.

The previous prime is 15442671469. The next prime is 15442671493. The reversal of 15442671487 is 78417624451.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15442671487 is a prime.

It is a super-2 number, since 2×15442671487² (a number of 21 digits) contains 22 as substring.

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 15442671487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15442671467) 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, 24947464 + ... + 24948082.

It is an arithmetic number, because the mean of its divisors is an integer number (977335450).

Almost surely, 2^15442671487 is an apocalyptic number.

15442671487 is a deficient number, since it is larger than the sum of its proper divisors (194695713).

15442671487 is a wasteful number, since it uses less digits than its factorization.

15442671487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546.

The product of its digits is 1505280, while the sum is 49.

The spelling of 15442671487 in words is "fifteen billion, four hundred forty-two million, six hundred seventy-one thousand, four hundred eighty-seven".