1640133351 has 12 divisors (see below), whose sum is σ = 2372674200. Its totient is φ = 1091764080.

The previous prime is 1640133349. The next prime is 1640133359. The reversal of 1640133351 is 1533310461.

1640133351 is a `hidden beast` number, since 1 + 640 + 13 + 3 + 3 + 5 + 1 = 666.

1640133351 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1640133351 - 2¹ = 1640133349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640133359) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131901 + ... + 143798.

It is an arithmetic number, because the mean of its divisors is an integer number (197722850).

Almost surely, 2^1640133351 is an apocalyptic number.

1640133351 is a deficient number, since it is larger than the sum of its proper divisors (732540849).

1640133351 is a wasteful number, since it uses less digits than its factorization.

1640133351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276366 (or 276363 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 1640133351 is about 40498.5598632840. The cubic root of 1640133351 is about 1179.3056699994.

The spelling of 1640133351 in words is "one billion, six hundred forty million, one hundred thirty-three thousand, three hundred fifty-one".