156754340121613 has 8 divisors (see below), whose sum is σ = 168812476403256. Its totient is φ = 144696219571200.

The previous prime is 156754340121487. The next prime is 156754340121619. The reversal of 156754340121613 is 316121043457651.

It can be written as a sum of positive squares in 4 ways, for example, as 3454234122249 + 153300105999364 = 1858557^2 + 12381442^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 156754340121613 - 2⁴¹ = 154555316866061 is a prime.

It is a super-2 number, since 2×156754340121613² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156754340121619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24234693 + ... + 30013813.

It is an arithmetic number, because the mean of its divisors is an integer number (21101559550407).

Almost surely, 2^{156754340121613} is an apocalyptic number.

156754340121613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

156754340121613 is a deficient number, since it is larger than the sum of its proper divisors (12058136281643).

156754340121613 is a wasteful number, since it uses less digits than its factorization.

156754340121613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7865615.

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 156754340121613 in words is "one hundred fifty-six trillion, seven hundred fifty-four billion, three hundred forty million, one hundred twenty-one thousand, six hundred thirteen".