40157554734637 has 2 divisors, whose sum is σ = 40157554734638. Its totient is φ = 40157554734636.

The previous prime is 40157554734613. The next prime is 40157554734797. The reversal of 40157554734637 is 73643745575104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39216225945796 + 941328788841 = 6262286^2 + 970221^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40157554734637 is a prime.

It is a super-2 number, since 2×40157554734637² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40157554734607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20078777367318 + 20078777367319.

It is an arithmetic number, because the mean of its divisors is an integer number (20078777367319).

Almost surely, 2^{40157554734637} is an apocalyptic number.

It is an amenable number.

40157554734637 is a deficient number, since it is larger than the sum of its proper divisors (1).

40157554734637 is an equidigital number, since it uses as much as digits as its factorization.

40157554734637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 148176000, while the sum is 61.

The spelling of 40157554734637 in words is "forty trillion, one hundred fifty-seven billion, five hundred fifty-four million, seven hundred thirty-four thousand, six hundred thirty-seven".