51266663700 has 288 divisors, whose sum is σ = 180150969600. Its totient is φ = 11026575360.

The previous prime is 51266663689. The next prime is 51266663711. The reversal of 51266663700 is 736666215.

It is an interprime number because it is at equal distance from previous prime (51266663689) and next prime (51266663711).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10314816 + ... + 10319784.

It is an arithmetic number, because the mean of its divisors is an integer number (625524200).

Almost surely, 2^51266663700 is an apocalyptic number.

51266663700 is a gapful number since it is divisible by the number (50) 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 51266663700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90075484800).

51266663700 is an abundant number, since it is smaller than the sum of its proper divisors (128884305900).

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

51266663700 is a wasteful number, since it uses less digits than its factorization.

51266663700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5044 (or 5003 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 42.

The spelling of 51266663700 in words is "fifty-one billion, two hundred sixty-six million, six hundred sixty-three thousand, seven hundred".