156240506505 has 16 divisors (see below), whose sum is σ = 254701506240. Its totient is φ = 81756038208.

The previous prime is 156240506473. The next prime is 156240506531. The reversal of 156240506505 is 505605042651.

It is a happy number.

It is not a de Polignac number, because 156240506505 - 2⁵ = 156240506473 is a prime.

It is a super-2 number, since 2×156240506505² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98263675 + ... + 98265264.

It is an arithmetic number, because the mean of its divisors is an integer number (15918844140).

Almost surely, 2^156240506505 is an apocalyptic number.

156240506505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

156240506505 is a deficient number, since it is larger than the sum of its proper divisors (98460999735).

156240506505 is a wasteful number, since it uses less digits than its factorization.

156240506505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196529000.

The product of its (nonzero) digits is 180000, while the sum is 39.

The spelling of 156240506505 in words is "one hundred fifty-six billion, two hundred forty million, five hundred six thousand, five hundred five".