1981058774 has 16 divisors (see below), whose sum is σ = 3009372912. Its totient is φ = 977950368.

The previous prime is 1981058767. The next prime is 1981058777. The reversal of 1981058774 is 4778501891.

It is a super-3 number, since 3×1981058774³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1981058777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337892 + ... + 343704.

It is an arithmetic number, because the mean of its divisors is an integer number (188085807).

Almost surely, 2^1981058774 is an apocalyptic number.

1981058774 is a deficient number, since it is larger than the sum of its proper divisors (1028314138).

1981058774 is a wasteful number, since it uses less digits than its factorization.

1981058774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7951.

The product of its (nonzero) digits is 564480, while the sum is 50.

The square root of 1981058774 is about 44509.0864206400. The cubic root of 1981058774 is about 1255.9310190218.

The spelling of 1981058774 in words is "one billion, nine hundred eighty-one million, fifty-eight thousand, seven hundred seventy-four".