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194290091537 is a prime number
BaseRepresentation
bin1011010011110010010…
…1111000011000010001
3200120111102002021121012
42310330211320120101
511140401230412122
6225131114540305
720015455346363
oct2647445703021
9616442067535
10194290091537
1175441767493
12317a3437695
1315424392209
149591a26d33
1550c203e7e2
hex2d3c978611

194290091537 has 2 divisors, whose sum is σ = 194290091538. Its totient is φ = 194290091536.

The previous prime is 194290091507. The next prime is 194290091557. The reversal of 194290091537 is 735190092491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194177710336 + 112381201 = 440656^2 + 10601^2 .

It is an emirp because it is prime and its reverse (735190092491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194290091537 - 26 = 194290091473 is a prime.

It is not a weakly prime, because it can be changed into another prime (194290091507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97145045768 + 97145045769.

It is an arithmetic number, because the mean of its divisors is an integer number (97145045769).

Almost surely, 2194290091537 is an apocalyptic number.

It is an amenable number.

194290091537 is a deficient number, since it is larger than the sum of its proper divisors (1).

194290091537 is an equidigital number, since it uses as much as digits as its factorization.

194290091537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 612360, while the sum is 50.

The spelling of 194290091537 in words is "one hundred ninety-four billion, two hundred ninety million, ninety-one thousand, five hundred thirty-seven".