157744647663 has 24 divisors (see below), whose sum is σ = 222028700976. Its totient is φ = 99605721600.

The previous prime is 157744647659. The next prime is 157744647667. The reversal of 157744647663 is 366746447751.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (157744647659) and next prime (157744647667).

It is not a de Polignac number, because 157744647663 - 2² = 157744647659 is a prime.

It is a super-2 number, since 2×157744647663² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 157744647597 and 157744647606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157744647667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5705533 + ... + 5733113.

It is an arithmetic number, because the mean of its divisors is an integer number (9251195874).

Almost surely, 2^157744647663 is an apocalyptic number.

157744647663 is a deficient number, since it is larger than the sum of its proper divisors (64284053313).

157744647663 is a wasteful number, since it uses less digits than its factorization.

157744647663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32903 (or 32884 counting only the distinct ones).

The product of its digits is 71124480, while the sum is 60.

The spelling of 157744647663 in words is "one hundred fifty-seven billion, seven hundred forty-four million, six hundred forty-seven thousand, six hundred sixty-three".