24980402077 has 4 divisors (see below), whose sum is σ = 24980724700. Its totient is φ = 24980079456.

The previous prime is 24980402053. The next prime is 24980402093. The reversal of 24980402077 is 77020408942.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 22940434521 + 2039967556 = 151461^2 + 45166^2 .

It is a 3-Lehmer number, since φ(24980402077) divides (24980402077-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24980402077 is a prime.

It is a deceptive number, since it divides R_24980402076.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24980402977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32263 + ... + 225835.

It is an arithmetic number, because the mean of its divisors is an integer number (6245181175).

Almost surely, 2^24980402077 is an apocalyptic number.

24980402077 is the 129049-th pentagonal number.

It is an amenable number.

24980402077 is a deficient number, since it is larger than the sum of its proper divisors (322623).

24980402077 is a wasteful number, since it uses less digits than its factorization.

24980402077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322622.

The product of its (nonzero) digits is 225792, while the sum is 43.

The spelling of 24980402077 in words is "twenty-four billion, nine hundred eighty million, four hundred two thousand, seventy-seven".