27975198294990 has 64 divisors (see below), whose sum is σ = 74601078347520. Its totient is φ = 7459997922720.

The previous prime is 27975198294973. The next prime is 27975198294991. The reversal of 27975198294990 is 9949289157972.

It is a happy number.

27975198294990 is a `hidden beast` number, since 2 + 7 + 9 + 7 + 519 + 8 + 2 + 9 + 4 + 9 + 90 = 666.

It is a super-2 number, since 2×27975198294990² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27975198294991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47391637 + ... + 47978303.

It is an arithmetic number, because the mean of its divisors is an integer number (1165641849180).

Almost surely, 2^{27975198294990} is an apocalyptic number.

27975198294990 is an abundant number, since it is smaller than the sum of its proper divisors (46625880052530).

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

27975198294990 is a wasteful number, since it uses less digits than its factorization.

27975198294990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763294 (or 763288 counting only the distinct ones).

The product of its (nonzero) digits is 1851776640, while the sum is 81.

The spelling of 27975198294990 in words is "twenty-seven trillion, nine hundred seventy-five billion, one hundred ninety-eight million, two hundred ninety-four thousand, nine hundred ninety".