1651515651642 has 32 divisors (see below), whose sum is σ = 3373824939264. Its totient is φ = 538709864000.

The previous prime is 1651515651637. The next prime is 1651515651647. The reversal of 1651515651642 is 2461565151561.

It is an interprime number because it is at equal distance from previous prime (1651515651637) and next prime (1651515651647).

It is a junction number, because it is equal to n+sod(n) for n = 1651515651591 and 1651515651600.

It is not an unprimeable number, because it can be changed into a prime (1651515651647) 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, 1410892 + ... + 2300792.

It is an arithmetic number, because the mean of its divisors is an integer number (105432029352).

Almost surely, 2^{1651515651642} is an apocalyptic number.

1651515651642 is an abundant number, since it is smaller than the sum of its proper divisors (1722309287622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1651515651642 is a wasteful number, since it uses less digits than its factorization.

1651515651642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896534.

The product of its digits is 1080000, while the sum is 48.

The spelling of 1651515651642 in words is "one trillion, six hundred fifty-one billion, five hundred fifteen million, six hundred fifty-one thousand, six hundred forty-two".