25475532019 has 16 divisors (see below), whose sum is σ = 31544460288. Its totient is φ = 20073739392.

The previous prime is 25475532013. The next prime is 25475532079. The reversal of 25475532019 is 91023557452.

It is a happy number.

It is not a de Polignac number, because 25475532019 - 2¹⁷ = 25475400947 is a prime.

It is a super-2 number, since 2×25475532019² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25475532013) 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, 2484187 + ... + 2494420.

It is an arithmetic number, because the mean of its divisors is an integer number (1971528768).

Almost surely, 2^25475532019 is an apocalyptic number.

25475532019 is a deficient number, since it is larger than the sum of its proper divisors (6068928269).

25475532019 is a wasteful number, since it uses less digits than its factorization.

25475532019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4978674.

The product of its (nonzero) digits is 378000, while the sum is 43.

The spelling of 25475532019 in words is "twenty-five billion, four hundred seventy-five million, five hundred thirty-two thousand, nineteen".