190147451481 has 45 divisors (see below), whose sum is σ = 307660532751. Its totient is φ = 116982420048.

The previous prime is 190147451471. The next prime is 190147451489. The reversal of 190147451481 is 184154741091.

The square root of 190147451481 is 436059.

It is a perfect power (a square), and thus also a powerful number.

190147451481 is a `hidden beast` number, since 1 + 90 + 1 + 47 + 4 + 514 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 28128321225 + 162019130256 = 167715^2 + 402516^2 .

It is not a de Polignac number, because 190147451481 - 2¹¹ = 190147449433 is a prime.

It is a super-2 number, since 2×190147451481² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (190147451489) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 51017040 + ... + 51020766.

Almost surely, 2^190147451481 is an apocalyptic number.

190147451481 is the 436059-th square number.

190147451481 is the 218030-th centered octagonal number.

It is an amenable number.

190147451481 is a deficient number, since it is larger than the sum of its proper divisors (117513081270).

190147451481 is an frugal number, since it uses more digits than its factorization.

190147451481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7492 (or 3743 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 190147451481 in words is "one hundred ninety billion, one hundred forty-seven million, four hundred fifty-one thousand, four hundred eighty-one".