2391758133961 has 9 divisors (see below), whose sum is σ = 2782261851111. Its totient is φ = 2050069121352.

The previous prime is 2391758133923. The next prime is 2391758133979. The reversal of 2391758133961 is 1693318571932.

The square root of 2391758133961 is 1546531.

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., 896136756025 + 1495621377936 = 946645^2 + 1222956^2 .

It is not a de Polignac number, because 2391758133961 - 2¹⁵ = 2391758101193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2391758133896 and 2391758133905.

It is not an unprimeable number, because it can be changed into a prime (2391758103961) 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, 10715251 + ... + 10936183.

It is an arithmetic number, because the mean of its divisors is an integer number (309140205679).

Almost surely, 2^{2391758133961} is an apocalyptic number.

2391758133961 is the 1546531-st square number.

2391758133961 is the 773266-th centered octagonal number.

It is an amenable number.

2391758133961 is a deficient number, since it is larger than the sum of its proper divisors (390503717150).

2391758133961 is an frugal number, since it uses more digits than its factorization.

2391758133961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441880 (or 220940 counting only the distinct ones).

The product of its digits is 7348320, while the sum is 58.

The spelling of 2391758133961 in words is "two trillion, three hundred ninety-one billion, seven hundred fifty-eight million, one hundred thirty-three thousand, nine hundred sixty-one".