87978498573 has 64 divisors (see below), whose sum is σ = 140779192320. Its totient is φ = 47814148800.

The previous prime is 87978498571. The next prime is 87978498589. The reversal of 87978498573 is 37589487978.

It is not a de Polignac number, because 87978498573 - 2¹ = 87978498571 is a prime.

It is a super-2 number, since 2×87978498573² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 87978498495 and 87978498504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87978498571) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20890438 + ... + 20894648.

It is an arithmetic number, because the mean of its divisors is an integer number (2199674880).

Almost surely, 2^87978498573 is an apocalyptic number.

It is an amenable number.

87978498573 is a deficient number, since it is larger than the sum of its proper divisors (52800693747).

87978498573 is a wasteful number, since it uses less digits than its factorization.

87978498573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4798.

The product of its digits is 853493760, while the sum is 75.

The spelling of 87978498573 in words is "eighty-seven billion, nine hundred seventy-eight million, four hundred ninety-eight thousand, five hundred seventy-three".