157275780621 has 8 divisors (see below), whose sum is σ = 209703235584. Its totient is φ = 104849423040.

The previous prime is 157275780617. The next prime is 157275780631. The reversal of 157275780621 is 126087572751.

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

It is not a de Polignac number, because 157275780621 - 2² = 157275780617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157275780631) 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, 156916 + ... + 582386.

It is an arithmetic number, because the mean of its divisors is an integer number (26212904448).

Almost surely, 2^157275780621 is an apocalyptic number.

It is an amenable number.

157275780621 is a deficient number, since it is larger than the sum of its proper divisors (52427454963).

157275780621 is a wasteful number, since it uses less digits than its factorization.

157275780621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548691.

The product of its (nonzero) digits is 1646400, while the sum is 51.

The spelling of 157275780621 in words is "one hundred fifty-seven billion, two hundred seventy-five million, seven hundred eighty thousand, six hundred twenty-one".