1775772147990 has 32 divisors (see below), whose sum is σ = 4261958021376. Its totient is φ = 473527587680.

The previous prime is 1775772147979. The next prime is 1775772147991. The reversal of 1775772147990 is 997412775771.

It is a super-2 number, since 2×1775772147990² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1775772147991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 547975 + ... + 1962605.

It is an arithmetic number, because the mean of its divisors is an integer number (133186188168).

Almost surely, 2^{1775772147990} is an apocalyptic number.

1775772147990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1775772147990 is an abundant number, since it is smaller than the sum of its proper divisors (2486185873386).

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

1775772147990 is a wasteful number, since it uses less digits than its factorization.

1775772147990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456484.

The product of its (nonzero) digits is 54454680, while the sum is 66.

The spelling of 1775772147990 in words is "one trillion, seven hundred seventy-five billion, seven hundred seventy-two million, one hundred forty-seven thousand, nine hundred ninety".