127951516990 has 64 divisors (see below), whose sum is σ = 261779724288. Its totient is φ = 44605987200.

The previous prime is 127951516969. The next prime is 127951516997. The reversal of 127951516990 is 99615159721.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127951516997) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 189532 + ... + 540208.

It is an arithmetic number, because the mean of its divisors is an integer number (4090308192).

Almost surely, 2^127951516990 is an apocalyptic number.

127951516990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

127951516990 is an abundant number, since it is smaller than the sum of its proper divisors (133828207298).

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

127951516990 is a wasteful number, since it uses less digits than its factorization.

127951516990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350833.

The product of its (nonzero) digits is 1530900, while the sum is 55.

The spelling of 127951516990 in words is "one hundred twenty-seven billion, nine hundred fifty-one million, five hundred sixteen thousand, nine hundred ninety".