1980158426 has 8 divisors (see below), whose sum is σ = 2972097684. Its totient is φ = 989459200.

The previous prime is 1980158353. The next prime is 1980158431. The reversal of 1980158426 is 6248510891.

It can be written as a sum of positive squares in 2 ways, for example, as 1246019401 + 734139025 = 35299^2 + 27095^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306005 + ... + 312408.

Almost surely, 2^1980158426 is an apocalyptic number.

1980158426 is a deficient number, since it is larger than the sum of its proper divisors (991939258).

1980158426 is a wasteful number, since it uses less digits than its factorization.

1980158426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620016.

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 1980158426 is about 44498.9710667561. The cubic root of 1980158426 is about 1255.7407257733.

The spelling of 1980158426 in words is "one billion, nine hundred eighty million, one hundred fifty-eight thousand, four hundred twenty-six".