1640520147 has 48 divisors (see below), whose sum is σ = 2578822272. Its totient is φ = 924900480.

The previous prime is 1640520137. The next prime is 1640520181. The reversal of 1640520147 is 7410250461.

It is not a de Polignac number, because 1640520147 - 2⁴ = 1640520131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1640520127) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7040743 + ... + 7040975.

It is an arithmetic number, because the mean of its divisors is an integer number (53725464).

Almost surely, 2^1640520147 is an apocalyptic number.

1640520147 is a deficient number, since it is larger than the sum of its proper divisors (938302125).

1640520147 is a wasteful number, since it uses less digits than its factorization.

1640520147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688 (or 681 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 1640520147 is about 40503.3350108358. The cubic root of 1640520147 is about 1179.3983687347.

The spelling of 1640520147 in words is "one billion, six hundred forty million, five hundred twenty thousand, one hundred forty-seven".