9778602780 has 36 divisors (see below), whose sum is σ = 29661762312. Its totient is φ = 2607627360.

The previous prime is 9778602763. The next prime is 9778602797. The reversal of 9778602780 is 872068779.

It is an interprime number because it is at equal distance from previous prime (9778602763) and next prime (9778602797).

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27162606 + ... + 27162965.

It is an arithmetic number, because the mean of its divisors is an integer number (823937842).

Almost surely, 2^9778602780 is an apocalyptic number.

9778602780 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9778602780 is an abundant number, since it is smaller than the sum of its proper divisors (19883159532).

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

9778602780 is a wasteful number, since it uses less digits than its factorization.

9778602780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54325586 (or 54325581 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 54.

The square root of 9778602780 is about 98886.8180295028. The cubic root of 9778602780 is about 2138.4163597365.

The spelling of 9778602780 in words is "nine billion, seven hundred seventy-eight million, six hundred two thousand, seven hundred eighty".