6426157757 has 4 divisors (see below), whose sum is σ = 6473064156. Its totient is φ = 6379251360.

The previous prime is 6426157711. The next prime is 6426157781. The reversal of 6426157757 is 7577516246.

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 2565523801 + 3860633956 = 50651^2 + 62134^2 .

It is a cyclic number.

It is not a de Polignac number, because 6426157757 - 2⁸ = 6426157501 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 (6426153757) 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, 23452994 + ... + 23453267.

It is an arithmetic number, because the mean of its divisors is an integer number (1618266039).

Almost surely, 2^6426157757 is an apocalyptic number.

It is an amenable number.

6426157757 is a deficient number, since it is larger than the sum of its proper divisors (46906399).

6426157757 is a wasteful number, since it uses less digits than its factorization.

6426157757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46906398.

The product of its digits is 2469600, while the sum is 50.

The square root of 6426157757 is about 80163.3192738424. The cubic root of 6426157757 is about 1859.1615441866.

The spelling of 6426157757 in words is "six billion, four hundred twenty-six million, one hundred fifty-seven thousand, seven hundred fifty-seven".