55353363780 has 192 divisors, whose sum is σ = 187960098816. Its totient is φ = 11987136000.

The previous prime is 55353363743. The next prime is 55353363817. The reversal of 55353363780 is 8736335355.

It is an interprime number because it is at equal distance from previous prime (55353363743) and next prime (55353363817).

It is a super-2 number, since 2×55353363780² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 161925 + ... + 370035.

It is an arithmetic number, because the mean of its divisors is an integer number (978958848).

Almost surely, 2^55353363780 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 55353363780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93980049408).

55353363780 is an abundant number, since it is smaller than the sum of its proper divisors (132606735036).

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

55353363780 is a wasteful number, since it uses less digits than its factorization.

55353363780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208178 (or 208176 counting only the distinct ones).

The product of its (nonzero) digits is 3402000, while the sum is 48.

The spelling of 55353363780 in words is "fifty-five billion, three hundred fifty-three million, three hundred sixty-three thousand, seven hundred eighty".