157620843621795 has 64 divisors (see below), whose sum is σ = 256510246400640. Its totient is φ = 82627468492800.

The previous prime is 157620843621757. The next prime is 157620843621799. The reversal of 157620843621795 is 597126348026751.

It is a Cunningham number, because it is equal to 12554714²-1.

It is not a de Polignac number, because 157620843621795 - 2¹⁰ = 157620843620771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157620843621799) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11487555535 + ... + 11487569255.

It is an arithmetic number, because the mean of its divisors is an integer number (4007972600010).

It is a 2-persistent number, because it is pandigital, and so is 2⋅157620843621795 = 315241687243590, but 3⋅157620843621795 = 472862530865385 is not.

Almost surely, 2^{157620843621795} is an apocalyptic number.

157620843621795 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

157620843621795 is a deficient number, since it is larger than the sum of its proper divisors (98889402778845).

157620843621795 is a wasteful number, since it uses less digits than its factorization.

157620843621795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21816.

The product of its (nonzero) digits is 152409600, while the sum is 66.

The spelling of 157620843621795 in words is "one hundred fifty-seven trillion, six hundred twenty billion, eight hundred forty-three million, six hundred twenty-one thousand, seven hundred ninety-five".