1861747475707 has 24 divisors (see below), whose sum is σ = 2190691273680. Its totient is φ = 1577384202240.

The previous prime is 1861747475671. The next prime is 1861747475711. The reversal of 1861747475707 is 7075747471681.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1861747475707 is a prime.

It is a super-2 number, since 2×1861747475707² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1861747475717) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15014232 + ... + 15137722.

It is an arithmetic number, because the mean of its divisors is an integer number (91278803070).

Almost surely, 2^{1861747475707} is an apocalyptic number.

1861747475707 is a deficient number, since it is larger than the sum of its proper divisors (328943797973).

1861747475707 is a wasteful number, since it uses less digits than its factorization.

1861747475707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127051 (or 127044 counting only the distinct ones).

The product of its (nonzero) digits is 64538880, while the sum is 64.

The spelling of 1861747475707 in words is "one trillion, eight hundred sixty-one billion, seven hundred forty-seven million, four hundred seventy-five thousand, seven hundred seven".