87978498550 has 12 divisors (see below), whose sum is σ = 163640007396. Its totient is φ = 35191399400.

The previous prime is 87978498533. The next prime is 87978498551. The reversal of 87978498550 is 5589487978.

It is a super-2 number, since 2×87978498550² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87978498550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87978498551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 879784936 + ... + 879785035.

It is an arithmetic number, because the mean of its divisors is an integer number (13636667283).

Almost surely, 2^87978498550 is an apocalyptic number.

87978498550 is a deficient number, since it is larger than the sum of its proper divisors (75661508846).

87978498550 is a wasteful number, since it uses less digits than its factorization.

87978498550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759569983 (or 1759569978 counting only the distinct ones).

The product of its (nonzero) digits is 203212800, while the sum is 70.

The spelling of 87978498550 in words is "eighty-seven billion, nine hundred seventy-eight million, four hundred ninety-eight thousand, five hundred fifty".