25387179490 has 16 divisors (see below), whose sum is σ = 45704564352. Its totient is φ = 10153173744.

The previous prime is 25387179473. The next prime is 25387179491. The reversal of 25387179490 is 9497178352.

It is a happy number.

It is a super-3 number, since 3×25387179490³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (25387179491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148554 + ... + 269893.

It is an arithmetic number, because the mean of its divisors is an integer number (2856535272).

Almost surely, 2^25387179490 is an apocalyptic number.

25387179490 is a deficient number, since it is larger than the sum of its proper divisors (20317384862).

25387179490 is a wasteful number, since it uses less digits than its factorization.

25387179490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424521.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 25387179490 in words is "twenty-five billion, three hundred eighty-seven million, one hundred seventy-nine thousand, four hundred ninety".