40157945251 has 4 divisors (see below), whose sum is σ = 40159686904. Its totient is φ = 40156203600.

The previous prime is 40157945213. The next prime is 40157945263. The reversal of 40157945251 is 15254975104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40157945251 - 2²¹ = 40155848099 is a prime.

It is a super-2 number, since 2×40157945251² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40157945198 and 40157945207.

It is not an unprimeable number, because it can be changed into a prime (40157948251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 835770 + ... + 882511.

It is an arithmetic number, because the mean of its divisors is an integer number (10039921726).

Almost surely, 2^40157945251 is an apocalyptic number.

40157945251 is a deficient number, since it is larger than the sum of its proper divisors (1741653).

40157945251 is a wasteful number, since it uses less digits than its factorization.

40157945251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1741652.

The product of its (nonzero) digits is 252000, while the sum is 43.

The spelling of 40157945251 in words is "forty billion, one hundred fifty-seven million, nine hundred forty-five thousand, two hundred fifty-one".