156557780660 has 48 divisors (see below), whose sum is σ = 336555291072. Its totient is φ = 61141651200.

The previous prime is 156557780657. The next prime is 156557780663. The reversal of 156557780660 is 66087755651.

It is an interprime number because it is at equal distance from previous prime (156557780657) and next prime (156557780663).

It is a super-3 number, since 3×156557780660³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 156557780596 and 156557780605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156557780663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2131955 + ... + 2204165.

It is an arithmetic number, because the mean of its divisors is an integer number (7011568564).

Almost surely, 2^156557780660 is an apocalyptic number.

156557780660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156557780660 is an abundant number, since it is smaller than the sum of its proper divisors (179997510412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

156557780660 is a wasteful number, since it uses less digits than its factorization.

156557780660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74784 (or 74782 counting only the distinct ones).

The product of its (nonzero) digits is 10584000, while the sum is 56.

The spelling of 156557780660 in words is "one hundred fifty-six billion, five hundred fifty-seven million, seven hundred eighty thousand, six hundred sixty".