748156371881 has 4 divisors (see below), whose sum is σ = 748159794132. Its totient is φ = 748152949632.

The previous prime is 748156371877. The next prime is 748156371887. The reversal of 748156371881 is 188173651847.

It is a happy number.

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 269729616025 + 478426755856 = 519355^2 + 691684^2 .

It is a cyclic number.

It is not a de Polignac number, because 748156371881 - 2² = 748156371877 is a prime.

It is a super-2 number, since 2×748156371881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 748156371881.

It is not an unprimeable number, because it can be changed into a prime (748156371887) 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, 1359056 + ... + 1828481.

It is an arithmetic number, because the mean of its divisors is an integer number (187039948533).

Almost surely, 2^748156371881 is an apocalyptic number.

It is an amenable number.

748156371881 is a deficient number, since it is larger than the sum of its proper divisors (3422251).

748156371881 is a wasteful number, since it uses less digits than its factorization.

748156371881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3422250.

The product of its digits is 9031680, while the sum is 59.

The spelling of 748156371881 in words is "seven hundred forty-eight billion, one hundred fifty-six million, three hundred seventy-one thousand, eight hundred eighty-one".