136778976 has 96 divisors (see below), whose sum is σ = 416344320. Its totient is φ = 43604352.

The previous prime is 136778969. The next prime is 136778987. The reversal of 136778976 is 679877631.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16431 + ... + 23313.

It is an arithmetic number, because the mean of its divisors is an integer number (4336920).

Almost surely, 2^136778976 is an apocalyptic number.

136778976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136778976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208172160).

136778976 is an abundant number, since it is smaller than the sum of its proper divisors (279565344).

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

136778976 is a wasteful number, since it uses less digits than its factorization.

136778976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6925 (or 6911 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 136778976 is about 11695.2544222005. The cubic root of 136778976 is about 515.2362958753.

The spelling of 136778976 in words is "one hundred thirty-six million, seven hundred seventy-eight thousand, nine hundred seventy-six".