149756385457 has 4 divisors (see below), whose sum is σ = 171150154816. Its totient is φ = 128362616100.

The previous prime is 149756385451. The next prime is 149756385463. The reversal of 149756385457 is 754583657941.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 754583657941 = 1723 ⋅437947567.

It is an interprime number because it is at equal distance from previous prime (149756385451) and next prime (149756385463).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149756385457 is a prime.

It is a super-2 number, since 2×149756385457² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149756385451) 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, 10696884669 + ... + 10696884682.

It is an arithmetic number, because the mean of its divisors is an integer number (42787538704).

Almost surely, 2^149756385457 is an apocalyptic number.

It is an amenable number.

149756385457 is a deficient number, since it is larger than the sum of its proper divisors (21393769359).

149756385457 is an equidigital number, since it uses as much as digits as its factorization.

149756385457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21393769358.

The product of its digits is 127008000, while the sum is 64.

The spelling of 149756385457 in words is "one hundred forty-nine billion, seven hundred fifty-six million, three hundred eighty-five thousand, four hundred fifty-seven".