245717717542 has 16 divisors (see below), whose sum is σ = 411890454864. Its totient is φ = 108965728000.

The previous prime is 245717717527. The next prime is 245717717561.

245717717542 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 245717717542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136206259 + ... + 136208062.

It is an arithmetic number, because the mean of its divisors is an integer number (25743153429).

Almost surely, 2^245717717542 is an apocalyptic number.

245717717542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

245717717542 is a deficient number, since it is larger than the sum of its proper divisors (166172737322).

245717717542 is a wasteful number, since it uses less digits than its factorization.

245717717542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272414375.

The product of its digits is 3841600, while the sum is 52.

The spelling of 245717717542 in words is "two hundred forty-five billion, seven hundred seventeen million, seven hundred seventeen thousand, five hundred forty-two".