55156667904 has 240 divisors, whose sum is σ = 176800179600. Its totient is φ = 16970563584.

The previous prime is 55156667897. The next prime is 55156667911. The reversal of 55156667904 is 40976665155.

It is an interprime number because it is at equal distance from previous prime (55156667897) and next prime (55156667911).

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2324452 + ... + 2348060.

It is an arithmetic number, because the mean of its divisors is an integer number (736667415).

Almost surely, 2^55156667904 is an apocalyptic number.

55156667904 is a gapful number since it is divisible by the number (54) 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 55156667904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88400089800).

55156667904 is an abundant number, since it is smaller than the sum of its proper divisors (121643511696).

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

55156667904 is a wasteful number, since it uses less digits than its factorization.

55156667904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23662 (or 23627 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 54.

The spelling of 55156667904 in words is "fifty-five billion, one hundred fifty-six million, six hundred sixty-seven thousand, nine hundred four".