90778540000 has 120 divisors (see below), whose sum is σ = 230534555328. Its totient is φ = 35139840000.

The previous prime is 90778539983. The next prime is 90778540009. The reversal of 90778540000 is 4587709.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90778540009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 546792 + ... + 693208.

Almost surely, 2^90778540000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90778540000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115267277664).

90778540000 is an abundant number, since it is smaller than the sum of its proper divisors (139756015328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90778540000 is a wasteful number, since it uses less digits than its factorization.

90778540000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146478 (or 146455 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 90778540000 in words is "ninety billion, seven hundred seventy-eight million, five hundred forty thousand".