1601611949751 has 8 divisors (see below), whose sum is σ = 2329617381504. Its totient is φ = 970673908920.

The previous prime is 1601611949713. The next prime is 1601611949803. The reversal of 1601611949751 is 1579491161061.

It is a happy number.

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

It is not a de Polignac number, because 1601611949751 - 2¹⁴ = 1601611933367 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1601611949694 and 1601611949703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601611948751) 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, 24266847691 + ... + 24266847756.

It is an arithmetic number, because the mean of its divisors is an integer number (291202172688).

Almost surely, 2^{1601611949751} is an apocalyptic number.

1601611949751 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1601611949751 is a deficient number, since it is larger than the sum of its proper divisors (728005431753).

1601611949751 is a wasteful number, since it uses less digits than its factorization.

1601611949751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48533695461.

The product of its (nonzero) digits is 408240, while the sum is 51.

The spelling of 1601611949751 in words is "one trillion, six hundred one billion, six hundred eleven million, nine hundred forty-nine thousand, seven hundred fifty-one".