1651640134 has 32 divisors (see below), whose sum is σ = 2720342016. Its totient is φ = 748690560.

The previous prime is 1651640129. The next prime is 1651640141. The reversal of 1651640134 is 4310461561.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 1651640096 and 1651640105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231529 + ... + 238555.

It is an arithmetic number, because the mean of its divisors is an integer number (85010688).

Almost surely, 2^1651640134 is an apocalyptic number.

1651640134 is a deficient number, since it is larger than the sum of its proper divisors (1068701882).

1651640134 is a wasteful number, since it uses less digits than its factorization.

1651640134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7300.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1651640134 is about 40640.3756626338. The cubic root of 1651640134 is about 1182.0571541768.

The spelling of 1651640134 in words is "one billion, six hundred fifty-one million, six hundred forty thousand, one hundred thirty-four".