87978105453 has 16 divisors (see below), whose sum is σ = 134545861760. Its totient is φ = 50091708096.

The previous prime is 87978105443. The next prime is 87978105463. The reversal of 87978105453 is 35450187978.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87978105443) and next prime (87978105463).

It is not a de Polignac number, because 87978105453 - 2¹³ = 87978097261 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87978105393 and 87978105402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87978105433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7556338 + ... + 7567971.

It is an arithmetic number, because the mean of its divisors is an integer number (8409116360).

Almost surely, 2^87978105453 is an apocalyptic number.

It is an amenable number.

87978105453 is a deficient number, since it is larger than the sum of its proper divisors (46567756307).

87978105453 is a wasteful number, since it uses less digits than its factorization.

87978105453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15124596.

The product of its (nonzero) digits is 8467200, while the sum is 57.

The spelling of 87978105453 in words is "eighty-seven billion, nine hundred seventy-eight million, one hundred five thousand, four hundred fifty-three".