1504978881 has 16 divisors (see below), whose sum is σ = 2316010368. Its totient is φ = 851472000.

The previous prime is 1504978879. The next prime is 1504978897. The reversal of 1504978881 is 1888794051.

It is a happy number.

It is not a de Polignac number, because 1504978881 - 2¹ = 1504978879 is a prime.

It is a super-2 number, since 2×1504978881² = 4529922864512024322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1504978781) 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, 352660 + ... + 356901.

It is an arithmetic number, because the mean of its divisors is an integer number (144750648).

Almost surely, 2^1504978881 is an apocalyptic number.

It is an amenable number.

1504978881 is a deficient number, since it is larger than the sum of its proper divisors (811031487).

1504978881 is a wasteful number, since it uses less digits than its factorization.

1504978881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709672.

The product of its (nonzero) digits is 645120, while the sum is 51.

The square root of 1504978881 is about 38794.0572897448. The cubic root of 1504978881 is about 1145.9793762602.

The spelling of 1504978881 in words is "one billion, five hundred four million, nine hundred seventy-eight thousand, eight hundred eighty-one".