4751999991861 has 4 divisors (see below), whose sum is σ = 6335999989152. Its totient is φ = 3167999994572.

The previous prime is 4751999991859. The next prime is 4751999991883. The reversal of 4751999991861 is 1681999991574.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4751999991861 - 2¹ = 4751999991859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4751999991821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 791999998641 + ... + 791999998646.

It is an arithmetic number, because the mean of its divisors is an integer number (1583999997288).

Almost surely, 2^{4751999991861} is an apocalyptic number.

It is an amenable number.

4751999991861 is a deficient number, since it is larger than the sum of its proper divisors (1583999997291).

4751999991861 is a wasteful number, since it uses less digits than its factorization.

4751999991861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583999997290.

The product of its digits is 396809280, while the sum is 78.

The spelling of 4751999991861 in words is "four trillion, seven hundred fifty-one billion, nine hundred ninety-nine million, nine hundred ninety-one thousand, eight hundred sixty-one".