127157551700 has 72 divisors (see below), whose sum is σ = 283377555384. Its totient is φ = 49496832000.

The previous prime is 127157551693. The next prime is 127157551739. The reversal of 127157551700 is 7155751721.

It can be written as a sum of positive squares in 12 ways, for example, as 53149613764 + 74007937936 = 230542^2 + 272044^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1588640 + ... + 1666760.

Almost surely, 2^127157551700 is an apocalyptic number.

127157551700 is a gapful number since it is divisible by the number (10) 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 127157551700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141688777692).

127157551700 is an abundant number, since it is smaller than the sum of its proper divisors (156220003684).

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

127157551700 is a wasteful number, since it uses less digits than its factorization.

127157551700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78573 (or 78566 counting only the distinct ones).

The product of its (nonzero) digits is 85750, while the sum is 41.

The spelling of 127157551700 in words is "one hundred twenty-seven billion, one hundred fifty-seven million, five hundred fifty-one thousand, seven hundred".