78508901541 has 32 divisors (see below), whose sum is σ = 123809587200. Its totient is φ = 43303314240.

The previous prime is 78508901503. The next prime is 78508901551. The reversal of 78508901541 is 14510980587.

It is a happy number.

It is not a de Polignac number, because 78508901541 - 2¹⁸ = 78508639397 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78508901551) 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 31 ways as a sum of consecutive naturals, for example, 98230 + ... + 408248.

It is an arithmetic number, because the mean of its divisors is an integer number (3869049600).

Almost surely, 2^78508901541 is an apocalyptic number.

It is an amenable number.

78508901541 is a deficient number, since it is larger than the sum of its proper divisors (45300685659).

78508901541 is a wasteful number, since it uses less digits than its factorization.

78508901541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310449.

The product of its (nonzero) digits is 403200, while the sum is 48.

The spelling of 78508901541 in words is "seventy-eight billion, five hundred eight million, nine hundred one thousand, five hundred forty-one".