3988775747501 has 8 divisors (see below), whose sum is σ = 3991102590744. Its totient is φ = 3986449122880.

The previous prime is 3988775747479. The next prime is 3988775747507. The reversal of 3988775747501 is 1057475778893.

It can be written as a sum of positive squares in 4 ways, for example, as 521899325476 + 3466876422025 = 722426^2 + 1861955^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3988775747501 is a prime.

It is a super-2 number, since 2×3988775747501² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3988775747507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49026011 + ... + 49107303.

It is an arithmetic number, because the mean of its divisors is an integer number (498887823843).

Almost surely, 2^{3988775747501} is an apocalyptic number.

It is an amenable number.

3988775747501 is a deficient number, since it is larger than the sum of its proper divisors (2326843243).

3988775747501 is a wasteful number, since it uses less digits than its factorization.

3988775747501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109311.

The product of its (nonzero) digits is 414892800, while the sum is 71.

The spelling of 3988775747501 in words is "three trillion, nine hundred eighty-eight billion, seven hundred seventy-five million, seven hundred forty-seven thousand, five hundred one".