156400640553 has 4 divisors (see below), whose sum is σ = 208534187408. Its totient is φ = 104267093700.

The previous prime is 156400640531. The next prime is 156400640569. The reversal of 156400640553 is 355046004651.

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.

It is not a de Polignac number, because 156400640553 - 2¹³ = 156400632361 is a prime.

It is a super-2 number, since 2×156400640553² (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 (156400640153) 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, 26066773423 + ... + 26066773428.

It is an arithmetic number, because the mean of its divisors is an integer number (52133546852).

Almost surely, 2^156400640553 is an apocalyptic number.

It is an amenable number.

156400640553 is a deficient number, since it is larger than the sum of its proper divisors (52133546855).

156400640553 is an equidigital number, since it uses as much as digits as its factorization.

156400640553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52133546854.

The product of its (nonzero) digits is 216000, while the sum is 39.

It can be divided in two parts, 156400 and 640553, that added together give a triangular number (796953 = T₁₂₆₂).

The spelling of 156400640553 in words is "one hundred fifty-six billion, four hundred million, six hundred forty thousand, five hundred fifty-three".