1980458465 has 16 divisors (see below), whose sum is σ = 2436134400. Its totient is φ = 1544695680.

The previous prime is 1980458461. The next prime is 1980458477. The reversal of 1980458465 is 5648540891.

It is not a de Polignac number, because 1980458465 - 2² = 1980458461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1980458461) 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, 489782 + ... + 493808.

It is an arithmetic number, because the mean of its divisors is an integer number (152258400).

Almost surely, 2^1980458465 is an apocalyptic number.

It is an amenable number.

1980458465 is a deficient number, since it is larger than the sum of its proper divisors (455675935).

1980458465 is a wasteful number, since it uses less digits than its factorization.

1980458465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6472.

The product of its (nonzero) digits is 1382400, while the sum is 50.

The square root of 1980458465 is about 44502.3422417293. The cubic root of 1980458465 is about 1255.8041469889.

The spelling of 1980458465 in words is "one billion, nine hundred eighty million, four hundred fifty-eight thousand, four hundred sixty-five".