1492939415881 has 9 divisors (see below), whose sum is σ = 1525438605799. Its totient is φ = 1461118541944.

The previous prime is 1492939415879. The next prime is 1492939415887. The reversal of 1492939415881 is 1885149392941.

The square root of 1492939415881 is 1221859.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 153096125625 + 1339843290256 = 391275^2 + 1157516^2 .

It is not a de Polignac number, because 1492939415881 - 2¹ = 1492939415879 is a prime.

It is a super-2 number, since 2×1492939415881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1492939415887) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 57414375 + ... + 57440371.

Almost surely, 2^{1492939415881} is an apocalyptic number.

1492939415881 is the 1221859-th square number.

1492939415881 is the 610930-th centered octagonal number.

It is an amenable number.

1492939415881 is a deficient number, since it is larger than the sum of its proper divisors (32499189918).

1492939415881 is an frugal number, since it uses more digits than its factorization.

1492939415881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52088 (or 26044 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 64.

Multiplying 1492939415881 by its sum of digits (64), we get a square (95548122616384 = 9774872²).

The spelling of 1492939415881 in words is "one trillion, four hundred ninety-two billion, nine hundred thirty-nine million, four hundred fifteen thousand, eight hundred eighty-one".