1651655741 has 4 divisors (see below), whose sum is σ = 1651854684. Its totient is φ = 1651456800.

The previous prime is 1651655699. The next prime is 1651655743. The reversal of 1651655741 is 1475561561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 843902500 + 807753241 = 29050^2 + 28421^2 .

It is a cyclic number.

It is not a de Polignac number, because 1651655741 - 2²⁶ = 1584546877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1651655743) 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, 86450 + ... + 103811.

It is an arithmetic number, because the mean of its divisors is an integer number (412963671).

Almost surely, 2^1651655741 is an apocalyptic number.

It is an amenable number.

1651655741 is a deficient number, since it is larger than the sum of its proper divisors (198943).

1651655741 is an equidigital number, since it uses as much as digits as its factorization.

1651655741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198942.

The product of its digits is 126000, while the sum is 41.

The square root of 1651655741 is about 40640.5676756612. The cubic root of 1651655741 is about 1182.0608774068.

The spelling of 1651655741 in words is "one billion, six hundred fifty-one million, six hundred fifty-five thousand, seven hundred forty-one".